Article
Materials Science, Ceramics
A. Alipour, Sh Torkian, A. Ghasemi, M. Tavoosi, G. R. Gordani
Summary: This study prepared and investigated an exchange spring magnet with a new composition, demonstrating efficient exchange coupling behavior in SrFe12O19/Co nanocomposites with different hard/soft magnetic phase ratios. The non-aqueous polyol method was used for size control and impurity avoidance, confirmed by X-ray diffraction and SEM analysis. Vibrating sample magnetometer analysis revealed that the nanocomposite with 15% mass ratio of soft phase exhibited the highest exchange coupling interactions.
CERAMICS INTERNATIONAL
(2021)
Article
Physics, Applied
Michele Petrecca, Beatrice Muzzi, Stefano Maria Oliveri, Martin Albino, Nader Yaacoub, Davide Peddis, Cesar de Julian Fernandez, Claudia Innocenti, Claudio Sangregorio
Summary: The article discusses the exploitation of exchange coupling between hard and soft magnetic materials to enhance the magnetic performance of rare-earth free permanent magnets. It reports the synthesis of nanometric SFO and zinc-doped ferrite composites through scalable and eco-friendly approaches. Despite promising results in forming exchange coupled composite at 1100 degrees C, there was no improvement in energy product, indicating a need for further experimental efforts.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Materials Science, Ceramics
Shalom Ann Mathews, D. Rajan Babu
Summary: (1-x)SrFe10Al2O19/(x)Co0.6Zn0.4Fe2O4-(SFAO/CZFO) hard/soft nanocomposite ferrite materials were synthesized by a "one-pot" self-propagating combustion route. The exchange coupling behavior between the hard and soft magnetic grains significantly influenced the microwave absorption capacity of the samples.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
H. Jalili, B. Aslibeiki, A. Hajalilou, O. Musalu, L. P. Ferreira, M. M. Cruz
Summary: Recent studies have demonstrated the importance of the chemical composition and shape of magnetic nanoparticles in determining their properties. In this study, we synthesized cube-like nanoparticles and bimagnetic nanocomposites using an eco-friendly co-precipitation method. The nanocomposites exhibited good exchange-coupling interaction between the hard and soft magnetic phases, resulting in enhanced saturation magnetization. These materials showed promise for use in magnetic hyperthermia.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Jiaojiao Ji, Shuang Zhang, Chunxiang Cao, Shubing Su, Runjian Jiang, Ailin Xia, Huiyan Zhang, Hailing Li, Zhiyuan Liu, Chuangui Jin
Summary: This study investigated the preparation of SrFe12O19/Cae(2)O(4) composites using chemical coprecipitation method, and studied the effects of exchange coupling interaction and aligning magnetic field on magnetic properties. The results showed that exchange coupling interaction improved the saturation magnetization and reduced coercivity, while aligning magnetic field enhanced these properties without affecting phase composition, morphology, and exchange coupling interaction significantly.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Chemistry, Physical
Yassine Slimani, Munirah A. Almessiere, Abdulhadi Baykal, Mohammed A. Gondal, Nedaa Tashkandi
Summary: Hard/soft CoFe2O4/Ni0.8Cu0.1Zn0.1Fe2O4 nanocomposites were prepared using the ultrasonic irradiation method, and the particle size decreased with increasing ultrasonication duration. The nanocomposites showed superparamagnetic behavior at room temperature and ferrimagnetic behavior at low temperatures. Intergranular exchange coupling interactions dominated over intergranular dipolar interactions.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
M. A. Almessiere, N. A. Algarou, Y. Slimani, A. Sadaqat, A. Baykal, A. Manikandan, S. V. Trukhanov, A. V. Trukhanov, I. Ercan
Summary: This article investigates the synthesis, structural features, magnetic properties, and microwave properties of hard/soft SrNiZr/CFO nanocomposites. The samples were prepared using a sol-gel auto-combustion approach and their structural characteristics were verified through XRD, SEM, TEM, and HR-TEM techniques. The magnetic measurements showed good exchange coupling between the hard and soft phases at room temperature, but weak coupling at low temperature. The electromagnetic properties and the correlation with the magnetic phase ratio were also analyzed.
MATERIALS TODAY NANO
(2022)
Article
Chemistry, Physical
Pierfrancesco Maltoni, Tapati Sarkar, Gianni Barucca, Gaspare Varvaro, Federico Locardi, Davide Peddis, Roland Mathieu
Summary: Magnetic nanocomposites based on ferrite were synthesized using a sol-gel approach, showing potential for exchange-coupled bimagnetic behavior. By studying the distribution of hard/soft particles, interface optimization, and magnetic response through XRPD, TEM, and magnetic measurements, the study established the potential of hard/soft SFO/CFO nanostructures in current permanent magnet technology.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Materials Science, Ceramics
Shuang Zhang, Chunxiang Cao, Shubing Su, Ailin Xia, Huiyan Zhang, Hailing Li, Zhiyuan Liu, Chuangui Jin
Summary: Anisotropic exchange coupling interaction was observed in sintered oblate cylindrical SrFe12O19 specimens synthesized via a hydrothermal method. The exchange coupling interaction occurred between hard-hard magnetic grains in both as-pressed and sintered samples. However, this interaction was only found in the in-plane direction and not in the out-of-plane direction for the sintered specimens. The anisotropy was attributed to the vertically arranged plate-like SrM grains with micrometer width and nanometer thickness, as confirmed by cross-sectional morphologies of fractured specimens.
JOURNAL OF ADVANCED CERAMICS
(2023)
Article
Materials Science, Ceramics
Gang Fang, Chuyang Liu, Yun Yang, Kangsen Peng, Guoyue Xu, Yujing Zhang
Summary: By synthesizing hard/soft magnetic composites Ba(Zr-Ni)(0.6)Fe10.8O19/Fe3O4, this study successfully achieved a broad microwave absorption bandwidth. Increasing the heat treatment temperature led to more Fe3O4 particles attaching to Ba(Zr-Ni)(0.6)Fe10.8O19 particles, enhancing the exchange coupling effect and ultimately widening the magnetic loss range, resulting in a superior performance compared to most state-of-the-art microwave absorbers.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
V. Bilovol, M. Sikora, K. Berent
Summary: (100-x)SrFe12O19/(x)CoFe2O4 composites with different fractions of hexagonal and cubic ferrite powders as precursors were prepared by ball milling, where x = 10, 20, 30, 40 wt%. The as-prepared composites were annealed and analyzed using X-ray diffraction for structural analysis and energy dispersive X-ray analysis for elemental analysis. The magnetic properties were studied through magnetization measurements, direct current demagnetization, and isothermal remanence magnetization measurements. The composite sample with 10 wt% CoFe2O4 exhibited the highest energy product of 10.9 kJ/m3, which was approximately 20% higher than that of pristine SrFe12O19. The improved magnetic properties of the composite can be explained by the presence of exchange coupling effect extracted from Henkel plots.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Physics, Applied
Danqiang Huang, Xinchao Wen, Jianfeng Dai, Qing Wang, Hui Liu, Zengpeng Li
Summary: In this study, SrFe12O19@MFe2O4 (M = Co, Ni, Zn) core-shell nanofibers were fabricated using coaxial electrostatic spinning. The structure and morphology of the nanofibers were characterized by XRD, FE-SEM, and TEM. The magnetic properties of the nanofibers were measured using MPMS. The magnetic properties of the composites were found to be influenced by the diameter of the nanofibers, the exchange coupling between the two phases, and the nature of the soft magnetic phase itself.
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
(2023)
Article
Chemistry, Physical
Yassine Slimani, Munirah A. Almessiere, Sadik Guner, Abdulhadi Baykal, Murat Sertkol, Fatimah S. Alahmari, Eman M. Alsulami, Ismail A. Auwal
Summary: In this study, SrFe12O19, CoEu0.02Fe1.98O4, and hard/soft nanofiber composites were produced via electro-spinning approach. The results showed a well-achieved exchange-coupling between the hard and soft phases in the nanofiber composites, and the magnetization increased while the coercivity decreased with the increase in the ratio of hard/soft phases.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Physics, Condensed Matter
Farah Fattouh, Lama Rifai, Khulud Habanjar, A. M. Abdallah, R. Sayed Hassan, Nader Yaacoub, Ramadan Awad
Summary: Hard-soft nanocomposites were prepared using co-precipitation and high-speed ball milling techniques, showing better exchange coupling between grains for lower content of soft phase. Magnetic measurements indicated good single-phase magnetic behavior, with optimal magnetic properties achieved for x = 0.5. The enhancement of magnetic properties at low temperature was attributed to the reduction of thermal fluxes of magnetic moments at the surface.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Materials Science, Ceramics
M. A. Almessiere, Y. Slimani, N. A. Algarou, M. A. Gondal, Y. S. Wudil, M. Younas, I. A. Auwal, A. Baykal, A. Manikandan, T. Zubar, V. G. Kostishin, A. Trukhanov, I Ercan
Summary: The study prepared hard/soft nanocomposites using a sol-gel auto-combustion technique, showing complete exchange-coupled effects between phases and excellent electrodynamic parameters.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Hongmiao Zhou, Jiayi Tian, Ruoyu Wang, Difu Zhan, Peng Liu, Ruolin Chen, Yizhong Huang, Zhifeng Liu, Changcun Han
Summary: Photocatalytic hydrogen (H2) evolution is a promising method for generating clean energy, but the recombination of photo-generated carriers limits its efficiency. In this study, Ti3C2Cl2 MXene was used as a co-catalyst with g-C3N4 to enhance the photocatalytic hydrogen evolution activity. The Ti3C2Cl2/g-C3N4 composites showed improved performance due to enhanced separation of photo-generated carriers and increased light absorption. This safer approach without hydrofluoric acid (HF) offers a new method for manufacturing catalysts decorated with MXenes for highly efficient photocatalytic H2 evolution.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Yong Zhang, Pengfei Wu, Yu Lu, Xun Cao, Yizhong Huang, Vincent Gill, Zhiming Li
Summary: The atomic-scale structures of Z-plates in a Zr-alloyed Sm2Co17-type magnet were investigated using aberration-corrected STEM. Zr preferentially replaces dumbbell Sm to form (Sm1/3Zr2/3)Co3 Z-plates, which contribute to the enhancement of magnet performance. Different stacking types of Z-plates were observed, some of which exceed the thickness of double 2/3-stacking and degrade the oxidation resistance of the magnet. The diffusion-controlled mechanisms for the phase transformation from the 2:17R matrix to the 1:3R Z-plates were unraveled.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Yun Qu, Lei Qin, Yongzhen Yang, Xuguang Liu, Yizhong Huang
Summary: In this study, an N-doped magnetic carbon skeleton was developed as a porous adsorbent matrix with strong affinity adsorption sites and excellent selectivity properties for the removal of phenol from wastewater. By adjusting the thermal treatment condition, the pore volume and specific surface area of the adsorbent matrix could be finely tuned, resulting in an N-rich matrix structure with flexible mass transfer channel. The imprinted modification created phenol-shaped geometrical cavities on the matrix, activating the phenol recognition of N-active sites and providing selective adsorption property. The adsorbent demonstrated superior adsorption capacity and selective recognition towards phenol, outperforming previously reported adsorbents. Its easy magnetic separation property also allowed for excellent reusability. This adsorbent shows promising potential for separating pollutants from wastewater and contributes to the design of efficient comprehensive adsorbents.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Nanoscience & Nanotechnology
Yong Zhang, Pengfei Wu, Wenquan Ming, Xun Cao, Yizhong Huang, Zhiming Li
Summary: It is reported that the presence of Sm2O3 microparticles in Sm2Co17-type magnets may deteriorate their magnetic properties but improve mechanical and electrical performance. In this study, the distribution, structure, and elastic properties of Sm2O3 in a high-end Sm2Co17-type magnet were investigated. The results showed that the Sm2O3 microparticles with a size of 4.8 ± 2.1 μm were randomly dispersed in the magnet and acted as preferential sites for segregation of Zr-rich inclusions. The indexed structure of Sm2O3 was found to be metastable trigonal A-type, and its nano-twinned structure exhibited ductility, which could effectively reduce the brittleness of the magnet. This work provides insights into balancing the magnetic and mechanical properties of Sm2Co17-type magnets.
SCRIPTA MATERIALIA
(2023)
Article
Chemistry, Analytical
Xu Li, Jiali Huang, Jiayu Ding, Mingzhen Xiu, Kang Huang, Kang Cui, Jing Zhang, Shiji Hao, Yan Zhang, Jinghua Yu, Yizhong Huang
Summary: In this study, a dual-mode lab-on-paper device was constructed using BiVO4/FeOOH nanocomposites as an efficient photoelectrochemical (PEC)/colorimetric signal reporter for sensitive detection of carcinoembryonic antigen (CEA). The nanocomposites with an FeOOH needle-like structure displayed enhanced PEC response activity, enabling quantitative detection of CEA with the PEC signal readout mode. Additionally, a colorimetric signal readout system was achieved through a smart folding technique, providing a dual-mode signal readout for the lab-on-paper device.
Article
Chemistry, Multidisciplinary
Yong Wang, Na Gong, Hongfei Liu, Wei Ma, Kedar Hippalgaonkar, Zheng Liu, Yizhong Huang
Summary: Disordered solid-solution high-entropy alloys have been extensively studied as robust electrocatalysts, while ordered high-entropy intermetallics remain poorly explored with unknown effects on catalytic activity. In this study, a series of multicomponent intermetallic Pt4FeCoCuNi nanoparticles with tunable ordering degrees were fabricated, and the transformation mechanism from disordered to ordered structure was revealed. The electrocatalytic performance of Pt4FeCoCuNi nanoparticles was found to be correlated with their crystal and electronic structures, with increasing ordering degree promoting catalytic performance. The highly ordered Pt4FeCoCuNi nanoparticles achieved the highest mass activities for both acidic oxygen reduction reaction (ORR) and alkaline hydrogen evolution reaction (HER), outperforming commercial Pt/C by 18.9-fold and 5.6-fold, respectively.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
T. Zhang, Y. F. Yuan, B. X. Wang, G. S. Cai, P. F. Du, Y. Z. Huang, S. Y. Guo
Summary: CoSe nanoparticles grown on the inner surface of 3D honeycomb C successfully solves the challenges of volume changes and low conductivity, and demonstrates high cycling performance and exceptional rate capability, making it a potential anode material for high-performance LIBs.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Applied
Peilin Zhang, Chen Huang, Mingzhen Xiu, Siyu Zhu, Weiwei Wang, Bo Zhu, Likang Qin, Yizhong Huang, Luyang Chen
Summary: In this study, a nitrogen/sulfur-doped non-graphitized carbon material was developed and tested as an anode material for sodium-ion batteries. The material exhibited high discharge/charge capacity and cycle-stability, highlighting its potential for optimization in SIBs.
JOURNAL OF ENERGY CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Kang Huang, Jiuyang Xia, Yu Lu, Bowei Zhang, Wencong Shi, Xun Cao, Xinyue Zhang, Lilia M. Woods, Changcun Han, Chunjin Chen, Tian Wang, Junsheng Wu, Yizhong Huang
Summary: High catalytic efficiency and long-term stability are crucial for the performance of an electrocatalyst. This study focuses on the correlation between stability and catalytic efficiency in the FeCoNiRu high-entropy alloy (HEA). The HEA catalyst not only shows high efficiency in the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), but also maintains long-term stability. The outstanding stability is attributed to the spinel oxide surface layer formed during the evolution reactions, which preserves the active sites inherited from the HEA's intrinsic structure. This work provides valuable insights for the design and manufacturing of other metallic electrocatalysts and serves as a benchmark for evaluating their efficiency-stability relationship.
Article
Chemistry, Physical
Z. Y. Huang, Y. F. Yuan, Z. J. Yao, M. Zhu, S. M. Yin, Y. Z. Huang, S. Y. Guo, W. W. Yan
Summary: Ultrafine CoSe nanocrystals are embedded in honeycomb porous carbon nanofibers through a series of processes, including spinning ZIF-67 nanocubes into polyacrylonitrile fibers, etching of tannic acid, carbonization, and selenization. The resulting structure exhibits excellent electrochemical performance as an anode for sodium-ion batteries, with high discharge capacity and cycling stability. The performance is attributed to the unique combination of ultrafine CoSe nanocrystals, honeycomb cubic pores, and short carbon nanofibers.
APPLIED SURFACE SCIENCE
(2023)
Article
Electrochemistry
J. F. Wang, Y. F. Yuan, Z. C. Lin, J. J. Lin, S. B. Li, Y. Z. Huang, S. Y. Guo, W. W. Yan
Summary: In this study, a facile in-situ synthesis method was developed for the production of CoSn(OH)(6) nanocubes within mesoporous hollow carbon nanospheres (MHCSs) by using MHCSs as nanoreactors. The CoSn(OH)(6) nanocubes exhibited exceptional rate capability and excellent cycle performance when evaluated as an anode material for lithium-ion batteries. The outstanding electrochemical performance was attributed to the unique ship-in-a-bottle encapsulation structure, which facilitated electrolyte penetration, electron transfer, and prevented detachment and aggregation of CoSn(OH)(6).
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Physical
Yong Wang, Na Gong, Gang Niu, Junyu Ge, Xianyi Tan, Mingsheng Zhang, Hongfei Liu, Huibin Wu, Tzee Luai Meng, Huiqing Xie, Kedar Hippalgaonkar, Zheng Liu, Yizhong Huang
Summary: The search for cost-effective and efficient catalysts for oxygen and hydrogen evolution reactions is crucial for achieving a carbon-neutral future. High entropy alloys (HEAs), known for their stability and performance, have emerged as promising candidates in this field. However, the relationship between the phase and catalytic performance in HEAs is not well studied.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Z. Y. Huang, Y. F. Yuan, Z. C. Lin, J. J. Lin, S. B. Li, S. Y. Guo, Y. Z. Huang, W. W. Yan
Summary: Fluffy ultrathin WO3 nanoneedle clusters with unique ship-in-a-bottle structure are successfully synthesized in mesoporous hollow carbon nanospheres. The composite exhibits remarkable lithium storage performance and outstanding kinetics properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Sen Lai, Yongfeng Yuan, Min Zhu, Simin Yin, Yizhong Huang, Shaoyi Guo, Weiwei Yan
Summary: Achieving stable Zn plating/stripping under high current density and large area capacity remains a major challenge for metal Zn anodes. In this study, a 3D carbon fiber skeleton film modified with gradient Cu nanoparticles is constructed using common filter paper. The modified anode exhibits stable, reversible, and dendrite-free Zn plating/stripping, improved nucleation barrier of Zn, Zn2+ transport and deposition kinetics, as well as homogeneous and fine deposits on the Zn foil. Additionally, side reactions and by-products are effectively inhibited. This performance is attributed to the gradient zincophilic field in the 3D carbon fiber skeleton film.
Article
Chemistry, Physical
Difu Zhan, Jiayi Tian, Qian Fu, Peng Liu, Yahao Zhao, Wen Liu, Daqing Li, Yizhong Huang, Changcun Han
Summary: The hydrogen generated through photocatalytic technology is crucial for environmental resources and energy supply. In this study, Cu and Ni(OH)2 were used as modified co-catalysts to enhance the hydrogen evolution efficiency of the g-C3N4 photocatalyst. The dual-loaded photocatalyst exhibited lower carrier recombination rate, faster carrier transfer rate, and higher photocatalytic driving force.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Bibhutibhusan Nayak, S. Narayana Jammalamadaka
Summary: This article presents a method for remote detection of bovine serum albumin (BSA) using modified cantilever beam magnetometry (CBM). By combining a magnetostrictive Fe70Ga30 cantilever with optical detection technique, researchers were able to detect high concentrations of BSA remotely. The results of this study demonstrate the potential of this method in estimating the magnetostriction of thin films.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Yu Hao, R. E. Camley, Z. Celinski
Summary: Magnetic particles have various applications and their magnetic state is determined by their size and the strength of an applied magnetic field. Numerical simulations were performed to study the effect of an applied field on the critical size of single-domain magnetic particles, and the critical field at which a particle becomes single-domain was determined.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Nitesh Singh, Naresh Kumar, Dharohar Sahadot, Anil Annadi, Vidyadhar Singh, Murtaza Bohra
Summary: The unique magnetic properties of FM/AFM and hard-FM/soft-FM nanocomposite thin films have significant relevance for numerous applications. The composition and performance of different magnetic phases in the nanocomposite films can be significantly affected by the laser ablation conditions and annealing temperature.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Alya Ali Musaed, Samir Salem Al-Bawri, Khaled Aljaloud, Wazie M. Abdulkawi, Mohammad Tariqul Islam, Mandeep Jit Singh, Zaini Sakawi, Husam Hamid Ibrahim
Summary: This research presents a wideband tunable metamaterial for body-centric applications in the millimeter-wave frequency band. The proposed metamaterial has a wide operating frequency range and enhanced gain, making it suitable for improving the antenna performance in 5G wireless communication systems.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Binod K. Rai, Boris Maiorov, Krzysztof Gofryk, Patrick O'Rourke, Catherine Housley, Henry Ajo, Asraf Sawon, Arjun K. Pathak, Narayan Poudel, Qiang Zhang, Travis J. Williams, Matthias Frontzek
Summary: This manuscript reports on the structural and magnetic properties of NdCuGa3. The study confirmed the crystal structure and magnetic phase transition of NdCuGa3 using XRD, neutron diffraction, magnetization, and specific heat measurements. The neutron diffraction data further confirmed the antiferromagnetic phase of NdCuGa3.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Haonan Li, Cong Li, Hailiang Huang, Guodong Hao, Fei Wang
Summary: The electronic structure and ferroelectric-ferromagnetic coupling properties of Y-doped and vacancy-containing GaN-ZnO heterojunctions are systematically investigated. The magnetism in vacancy-containing systems is generated by the spin polarization of unpaired electrons induced by cationic vacancies, while in Y-doped systems, bound magnetic polarons are formed by the orbital hybridization of s-state and d-state electrons of Y-doped elements.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Muhammad Ijaz, Hafeez Ullah, Bandar Ali Al-Asbahi, Mati Ullah Khan, Zaheer Abbas, Sana Ullah Asif
Summary: M-type BaFe11.4-xAlxCo0.6O19 hexaferrites with Al3+ substitutions were synthesized using the co-precipitation method followed by Sonochemical process. The synthesized materials were characterized using XRD, FTIR, UV-vis spectroscopy, VSM, SEM, and LCR meter. The results showed that aluminum doping decreased the band gap and enhanced the magnetic and dielectric properties of the hexaferrites, making them suitable for various applications.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Oleg I. Utesov
Summary: The elementary excitations spectrum of anisotropic frustrated antiferromagnets in the fan phase is discussed. It is found that the low-energy part of the spectrum consists of a gapless phason branch with linear dispersion and a gapped optical branch corresponding to the fan structure amplitude oscillations. In the high-energy part of the spectrum, the excitations are similar to the magnons of the fully polarized phase.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Alexander Ya. Simonovskii, Alexander A. Yanovskii, Arthur R. Zakinyan
Summary: In this study, the departure frequency of vapor bubbles during boiling of ferrofluid in a horizontal magnetic field is experimentally investigated. Two methods, visual and inductive, are used to measure the frequency of bubble departure. The results show that the bubble departure frequency can decrease with increasing magnetic field strength and increase with increasing temperature of the heat-emitting surface. A linear stability analysis is conducted to analyze the influence of the magnetic field on the frequency of bubble formation during ferrofluid boiling.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Oleg Heczko, Michal Rames, Vit Kopecky, Petr Vertat, Michal Varga, Ladislav Straka
Summary: Heusler Ni-Mn-Ga alloys are multiferroic materials that exhibit magnetic shape memory (MSM) phenomena. By doping transition elements into Ni2MnGa alloys, the transformation temperatures can be modified and complex behaviors can be observed, such as the variation in saturation magnetization and the effects of elemental substitution on compound properties.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Carlos Ariel Samudio Perez, Ariel Flaig de Marchi
Summary: This study investigates the electronic and magnetic properties of the Full-Heusler Fe2MnAs alloy using first-principles calculations. The alloy may form spontaneously and exhibits a ferromagnetic order and high spin-polarization. It can be transformed into a half-metal by contracting the lattice constant. Additionally, certain defects contribute to the spin-polarization of the alloy, making it a fully half-metallic material.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Satish Geeri, Aditya Kolakoti, Prasadarao Bobbili
Summary: In this study, an electromagnetic wave-absorbing material was fabricated using a polymer composite material with fiber orientation and Multiwall Carbon Nanotubes as filler materials, along with a Perfect Electric Conducting material. The experiments demonstrated strong electromagnetic absorbing properties for the composites with PEC-coated and non-PEC-coated materials. Mechanical, thermal, and morphological analysis confirmed the similar trend in properties. CRITIC analysis helped identify the sequence order of sustaining properties for the fabricated composites.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Yankai Chen, Ruoxue Zhang, Yukai An
Summary: The piezoelectricity, valley character, and magnetic properties of 2H-VS2 monolayer were studied, revealing its potential applications in spintronics and valleytronics due to its bipolar magnetic semiconductor characteristics and superior physical properties.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Leonardo S. Lima
Summary: This study investigates the thermodynamic quantities, such as entropy, specific heat, and magnetic susceptibility, in the next-nearest-neighbors Heisenberg model on a honeycomb-kagome lattice. The linear spin-wave approach is applied to obtain the temperature-dependent behavior of these quantities. Additionally, the entanglement negativity, a quantifier of quantum entanglement, and the spin Hall conductivity are also studied. The results show that all the thermodynamic quantities, as well as the entanglement negativity and spin Hall conductivity, exhibit an increasing trend with temperature. Furthermore, it is found that all the analyzed quantities approach zero in the low-temperature limit, consistent with experimental observations.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Zhaoxing Wang, Maximilian Kai Reimann, Wang Chen, Yikun Zhang, Rainer Poettgen
Summary: The Mo2FeB2-type compounds RE2Ga2Mg (RE = Tm, Er, Ho) exhibit a large magnetocaloric effect, making them promising for cryogenic magnetic cooling applications.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
