Article
Chemistry, Physical
C. Y. Yue, Q. Wang, X. N. Zheng, A. L. Li, D. Ding, B. Z. Tang, P. Yu, J. L. Yao, L. Xia
Summary: This paper reports an amorphous ribbon Fe88Ce5Pr2B5 with outstanding magnetocaloric effect near ambient temperature. The Fe88Ce5Pr2B5 alloy was quenched into an amorphous ribbon shape successfully. The magnetic properties and magnetocaloric behavior of the Fe88Ce5Pr2B5 glassy ribbon were studied. It was found that the amorphous ribbon exhibited typical magnetocaloric behavior of second-order magnetic transition with a large maximum magnetic entropy change (- Delta Smpeak, -3.97 J/(kg x K) under 5 T) and adiabatic temperature rise (Delta Tad, -2.71 K under 5 T) near its Curie temperature (-309 K). The mechanism reported in literature for the almost highest -Delta Smpeak near 310 K of Fe88Ce5Pr2B5 metallic glass shows a promising perspective for achieving higher - Delta Smpeak in Fe-RE-B amorphous alloys.
Article
Materials Science, Ceramics
Yuan Zhang, Kun Han, Ming Li, Meng Gao, Xinming Wang, Gang Wang, Jun-Qiang Wang, Juntao Huo
Summary: In this study, a Co-based amorphous alloy with magnetocaloric effect near room temperature was successfully designed by modulating the chemical compositions. The Curie temperature was found to increase linearly with increasing Co content, and the Co content of 68.5 at.% was chosen as it exhibited magnetocaloric effect near room temperature.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Materials Science, Ceramics
Yunshuang Ma, Hangboce Yin, Fan Chen, Meng Gao, Lijian Song, Yan Zhang, Wei Xu, Li-Min Wang, Juntao Huo, Shuzhi Zhang, Jun-Qiang Wang
Summary: The new amorphous alloy (Tm67Cu33)80Al20 has a fully amorphous structure with a deep binary eutectic composition of Tm67Cu33. Due to the absence of magnetic moment in Cu and Al elements, the only magnetic interaction in the (Tm67Cu33)80Al20 amorphous alloy is Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction, resulting in a low Curie temperature (4.4 +/- 0.3 K). The (Tm67Cu33)80Al20 amorphous alloy exhibits a peak magnetic entropy change and refrigeration capacity of 13.4 +/- 0.7 J kg- 1 K - 1 and 174.2 +/- 10.5 J kg- 1, respectively, under a magnetic field change of 5 T. Compared to reported RE-based alloys with similar Curie temperature, the (Tm67Cu33)80Al20 amorphous alloy shows a relatively high magnetocaloric response. These findings suggest that the (Tm67Cu33)80Al20 amorphous alloy could be a promising candidate for magnetic refrigeration applications in the liquid helium temperature range.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Materials Science, Multidisciplinary
Xu Zhou, Qiang Wang, Leling Pan, Ding Ding, Benzhen Tang, Peng Yu, Jinlei Yao, Lei Xia
Summary: This study investigated the addition of a small amount of Co to the Fe88Ce7B5 glass forming alloy and its effects on the alloy's magnetic properties and magnetocaloric effect. The influence mechanism of Co addition on the amorphous alloys was also studied. Furthermore, a potential application perspective of the amorphous hybrid as a magnetic refrigerant was proposed.
Article
Thermodynamics
Selda Kilic Cetin, Gonul Akca, Mehmet Selim Aslan, Ahmet Ekicibil
Summary: In this study, composite materials were formed by overlapping the magnetic entropy peaks of LCSM and LSMN manganite to achieve larger RCP values near room temperature for magnetic cooling systems. The composite compounds showed magnetocaloric properties at temperatures close to room temperature, and larger RCP values were obtained by bringing the two entropy peaks closer to each other, which is of great technological importance.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Materials Science, Multidisciplinary
Semiramis Gulkesen, Kutluhan Utku Tumen, Mustafa Akyol, Ahmet Ekicibil
Summary: In this study, a series of Co(Cr1-xFex)(2)O-4 compounds were synthesized by sol-gel method, and it was found that magnetic and magnetocaloric properties were significantly altered when Fe ions partially replaced Cr ions in CoCr2O4. After 50% Fe substitution, the material exhibited higher magnetic transition temperature and magnetic entropy change values, making it a potential candidate for magnetic refrigerant applications.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Physics, Multidisciplinary
Shantanu Kumar Panda, Jyotirekha Mallick, Subhadeep Datta, Sambit Kumar Biswal, Shampa Guha, Manoranjan Kar
Summary: The observation of near room-temperature coupling of both magnetic and structural transitions in Fe substituted Mn-Ni-Si alloy leads to an interesting magneto-structural transition (MST) phenomenon which intensifies the required magnetocaloric parameters for magnetic cooling applications. The correlation between the unit cell parameters of both phases confirms that a large change in unit cell volume (similar to 2.9%) is mainly responsible for the structural transition. The simultaneous substitution of Fe across Ni and Mn sites helps to tune the MST temperature. The [Mn-0.64 Ni-0.64 Fe-0.72 Si] alloy exhibits a large isothermal magnetic entropy change (delta SM) of -19.2 +/- 0.4 J kg(-1) K(-1 )accompanied by a large value of effective refrigerant capacity (RCeffe) of 181.8 +/- 3.7 J kg(-1) due to a magnetic field change of 0-30 kOe. The estimated total entropy change associated with the complete structural transition from the calorimetric studies sets an upper limit for the entropy change of the system. The low cost and non-toxic nature of constituent elements, composition-dependent tunability of the transition temperature, and near room-temperature large magnetocaloric parameters make this alloy potentially suitable to be used as a refrigerant in solid-state magnetic cooling technology.
Article
Chemistry, Physical
X. Huang, X. T. Dong, X. C. Zhong, S. Y. Yao, J. H. Huang, C. L. Liu, J. Liu, Z. W. Liu, R. V. Ramanujan
Summary: The effect of La content on the phase formation, microstructural evolution, and magnetocaloric properties of off-stoichiometric LaxFe11Co0.8Si1.2 alloys was investigated. Increasing La content reduced the time required to form a high content of the desired 1:13 phase due to the presence of the 5:3 phase and fine alpha-Fe dendrites. However, excessive La content led to the formation of an undesirable La-rich phase. Annealing at 1323 K for 7 days resulted in a high content of the 1:13 phase (>90 wt%) and large maximum magnetic entropy change (-Delta S-M)(max) of 6.81-7.59 J/kg center dot K (Delta H = 2 T) in the temperature range 270-278 K in all samples. These alloys exhibit promising magnetic refrigeration properties for near room temperature applications, with large (-Delta S-M)(max) values, tunable Curie temperature (T-C), and short annealing time.
Article
Materials Science, Multidisciplinary
Natalia Lindner, Zbigniew Sniadecki, Mieszko Kolodziej, Jean-Marc Greneche, Jozef Marcin, Ivan Skorvanek, Bogdan Idzikowski
Summary: A magnetocaloric effect with wide tunability was observed in melt-spun amorphous Gd65Fe15-xCo5+xAl10Si5 alloys of different Fe/Co ratios. The Curie temperatures of the samples were between 155 and 195 K and increased with decreasing Co content. The highest magnetic entropy change ΔS-M was obtained for Gd65Fe5Co15Al10Si5 when the magnetic field was increased from 0 to 5 T.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Yikun Zhang, Jian Zhu, Zhihong Hao, Weixiang Hao, Zhaojun Mo, Lingwei Li
Summary: In this study, the structure, magnetic phase transition, and magnetocaloric performance of a series of rare-earth-free high-entropy (HE) alloys, Al20Mn20Fe20Co14.5+xCr25.5-x (x = 0, 1, and 2), were determined experimentally and theoretically analyzed. The alloys exhibited ferromagnetic behavior, and their Curie temperature could be tuned by changing the Co content. The maximum magnetic entropy changes obtained were comparable or superior to those of reported 3d metal-based HE alloys. The agreement between experimental characterizations and theoretical predictions provided an in-depth understanding of the rare-earth-free HE Al-Mn-Co-Fe-Cr alloy system.
MATERIALS & DESIGN
(2023)
Article
Chemistry, Physical
Cheng Sun, Hongjie Xu, Yang Meng, Xinchao Wang, Minhao Han, Boying Qiao, Yalong Wang, Tao Zhang
Summary: In this study, the thermal behavior, soft magnetic properties, and structure of Fe86-xP11C2B1Wx amorphous alloys were investigated. It was found that the addition of W improved the thermal stability and soft magnetic performance of the alloys.
Article
Chemistry, Physical
S. M. Wu, X. C. Zhong, X. T. Dong, C. L. Liu, J. H. Huang, Y. L. Huang, H. Y. Yu, Z. W. Liu, Y. S. Huang, R. V. Ramanujan
Summary: The effects of Pr40Co60 addition on the sintered LaFe11.6Si1.4/Pr40Co60 bulk composites were investigated, with improvements observed in the magnetic and magnetocaloric properties due to the diffusion of Pr and Co. In addition, the addition of Pr-Co alloy also affected the structure, thermal conductivity, and mechanical properties of the materials, making them promising candidates for near room temperature refrigeration.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Liang Wang, Zhichao Lu, Hanjie Guo, Yuan Wu, Yibo Zhang, Rui Zhao, Suihe Jiang, Xiongjun Liu, Hui Wang, Zhengdong Fu, Jinkui Zhao, Dong Ma, Zhaoping Lu
Summary: In this study, a series of rare-earth alloys with a single-phase HCP structure were developed using a multi-principal element alloying strategy. Gd0.8(TbDyHoEr)0.2 alloy exhibits high magnetic transition temperature and enhanced magnetocaloric properties, making it suitable for magnetic refrigeration. This work has important implications for designing high-performance magnetocaloric materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Shampa Guha, Subhadeep Datta, Shantanu Kumar Panda, Manoranjan Kar
Summary: The Fe2.5Mn0.5Al Heusler alloy, prepared by Arc melting method, crystallizes to B-2 phase in Fm-3m space group. The resistivity measurement shows semi-metallic behavior at low temperature due to magnon-magnon scattering dominance, while it exhibits semiconducting nature above the Curie temperature. These findings suggest a correlation between magnetic ordering and electrical transport properties. Arrott plot, Kouvel Fisher method, and Widom scaling relation were used to determine critical exponents, and the Curie temperature (Tc) was found to be near room temperature at 280 K. The critical exponents indicate that the magnetic ordering follows mean-field theory with a second-order paramagnetic to ferromagnetic transition. Additionally, a significant magnetocaloric effect was observed in a wide temperature range near room temperature due to the second-order magnetic phase transition, with the maximum entropy change occurring at 280 K (Tc).
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2022)
Article
Chemistry, Physical
Suo Zhang, Wenzhong Zhu, Chengfu Han, Wenqiang Li, Tan Wang, Chen Chen, Ran Wei, Shaojie Wu, Fushan Li
Summary: The influence of melt thermal history on Fe75Si9B12C4 amorphous alloy was systematically investigated. It was found that melt thermal history significantly affects the structural change of the alloy, resulting in differences in magnetic properties and thermal stability.
Article
Chemistry, Physical
Yu Jin, Guoguo Xi, Ran Li, Zi-An Li, Xiao-Bo Chen, Tao Zhang
Summary: The high anode overpotential of the oxygen evolution reaction (OER) in water electrolysis has been successfully addressed through the design and preparation of a group of nanoporous (Fe-Ni-Co)-based metallic glasses (NP-FeNiCo-MGs). The composite electrodes exhibit high catalytic activity towards water oxidation in 1 M KOH solutions, showing great potential for clean energy applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Xiaobin Liu, Jiazi Bi, Ziyang Meng, Yubin Ke, Ran Li, Tao Zhang
Summary: This study focused on inhibiting the generation of microcracks in Co-based metallic glass amorphous coatings by increasing substrate temperature and adding toughened Fe powders, as well as investigating the neutron shielding performance of coatings with high B content. The results showed that these methods effectively suppressed the initiation and propagation of microcracks, while high B content coatings exhibited excellent neutron shielding performance.
Article
Chemistry, Physical
Ju Wang, Ivan Kaban, Volodymyr Levytskyi, Ran Li, Junhee Han, Mihai Stoica, Roman Gumeniuk, Kornelius Nielsch
Summary: Co-Ta-B bulk metallic glasses exhibit a good combination of ultra-high fracture strength, Vickers hardness, and plastic strain. The crystallization process reveals the formation of a novel crystalline phase upon glass annealing.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Xiangguang Kong, Ying Yang, Shiyu Guo, Ran Li, Bo Feng, Daqiang Jiang, Meng Li, Changfeng Chen, Lishan Cui, Shijie Hao
Summary: By controlling the grain-size gradient, a novel shape memory behavior can be achieved in NiTi alloys, and the activating performance can be customized by controlling the pre-deformation strain to regulate the shape transition amplitude and speed.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Analytical
Jingshan Mo, Junqing Liu, Shuang Huang, Baoming Liang, Xinshuo Huang, Cheng Yang, Meiwan Chen, Jing Liu, Tong Zhang, Xi Xie, Jun Guo, Fanmao Liu, Hui-Jiuan Chen
Summary: This study demonstrates a method based on impedance measurements and numerical check screening algorithm to determine the transdermal rate of metallic microneedle arrays. Different sizes of metallic sheet microneedle array sensors were fabricated to evaluate different transdermal rates, and in vitro sensing experiments confirmed the effect of transdermal rate on sensing outcomes. Two methods for calculating the transdermal rate were derived, providing foundations for real-time transdermal rate estimation.
Article
Materials Science, Multidisciplinary
Xiaoyi Mo, Zhenxing Wen, Shengli Zhao, Jingshan Mo, Fanmao Liu, Meiwan Chen, Changyuan Zhan, Meng Zhang, Ji Wang, Shifeng Wen, Xi Xie, Hui-Jiuan Chen, Bailing Chen
Summary: This study introduces an integrated micro-extracting system for efficient extraction of interstitial fluid (ISF) and enrichment of biomacromolecular markers. The system utilizes microfabrication technology to create microchannels around dermal capillaries, enabling the enrichment of biomarkers in ISF. With negative pressure, ISF can be extracted efficiently. The system is minimally invasive and stable, making it suitable for disease diagnosis and prognosis.
MATERIALS & DESIGN
(2022)
Article
Chemistry, Multidisciplinary
Dong Liu, Qianni Wu, Wan Chen, Kexin Chen, Haotian Lin, Fanmao Liu, Xi Xie, Hui-jiuan Chen, Weirong Chen
Summary: This study presents a functionalized intraocular lens (R-IOL) with a region-confined photothermal effect for the prevention of posterior capsular opacification (PCO) after cataract surgery. The R-IOL, decorated with a nanoporous gold (NPG) ring, eliminates lens epithelial cells (LECs) and inhibits their migration, thus preventing PCO. The region-confined photothermal effect based on NPG provides a promising strategy to prevent PCO.
Article
Biophysics
Zhiran Shen, Fanmao Liu, Shuang Huang, Hao Wang, Cheng Yang, Tian Hang, Jun Tao, Wenhao Xia, Xi Xie
Summary: Flexible strain sensors play a crucial role in wearable and implantable electronics for human health monitoring and diagnosis. This paper selectively reviews the recent progresses and correlations between the device microstructure and their corresponding applications in flexible strain sensors, highlighting the advancements and potential future challenges in this field.
BIOSENSORS & BIOELECTRONICS
(2022)
Article
Chemistry, Multidisciplinary
Qianni Wu, Cheng Yang, Wan Chen, Kexin Chen, Hui-jiuan Chen, Fanmao Liu, Dong Liu, Haotian Lin, Xi Xie, Weirong Chen
Summary: A wireless-powered electrical bandage contact lens (EBCL) is developed to accelerate corneal wound healing and vision recovery through generating a localized external electric field. The electrical stimulation promotes cell migration and alignment, and controls cell division, proliferation, and migration.
Article
Chemistry, Multidisciplinary
Shuang Huang, Mengyi He, Chuanjie Yao, Xinshuo Huang, Deyuan Ma, Qiqi Huang, Jingbo Yang, Fanmao Liu, Xingqiao Wen, Ji Wang, Huijiuan Chen, Xi Xie
Summary: Current catheter devices in minimally invasive surgery lack multimodal integration and accurate intra-tissue detection. Here, a bioelectronic catheter with individually addressable microneedles is developed for tissue-penetrating theranostics. The catheter demonstrates multiple functions, including biochemical sensing, myoelectric modulation, electroporation, and drug delivery, enabling precise treatments of lesions.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Zhiran Shen, Chengduan Yang, Chuanjie Yao, Ziqi Liu, Xinshuo Huang, Zhengjie Liu, Jingshan Mo, Huihua Xu, Gen He, Jun Tao, Xi Xie, Tian Hang, Hui-Jiuan Chen, Fanmao Liu
Summary: In this work, a capacitive-piezoresistive hybrid flexible pressure sensor based on conductive micropillar arrays was developed to detect various physiological mechanical signals. The improved fabrication process and sensing strategy enabled all-round sensing performance and flexible design.
MATERIALS HORIZONS
(2023)
Article
Nanoscience & Nanotechnology
Jiazi Bi, Xinquan Wei, Xiaobin Liu, Ran Li, Ruijuan Xiao, Tao Zhang
Summary: A family of novel Os-Co-Ta-B high-temperature bulk metallic glasses (HTBMGs) with high glass transition temperature, Vickers microhardness, and compressive strength was fabricated by introducing high-modulus refractory metal Os and strong-covalent metalloid B. The impressive strength is attributed to the strong bond characteristics especially for Ta-Os and B-B bonds. The castable OsCo-based HTBMGs with superior mechanical properties and high thermal stabilities are significant for high-temperature applications as advanced structural materials.
SCRIPTA MATERIALIA
(2023)
Article
Chemistry, Physical
Chenlang Xie, Kaiyang Deng, Junfei Teng, Junying Fu, Ran Li, Tao Zhang
Summary: A family of novel Ni-based amorphous alloys with high W concentration was developed, and their crystallization and melting behaviors were evaluated. An optimal composition of Ni75W5B20 alloy, with high W concentration and near-eutectic melting behavior, was selected for brazing joint of GH3230 alloy. The effects of brazing temperature on microstructural evolution and mechanical properties of the joints were studied. The results showed that under the optimal brazing conditions, a homogeneous brazed seam with high tensile strength and dispersed Cr-rich borides can be obtained.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Biomaterials
Changyuan Zhan, Fanmao Liu, Zhiran Shen, Xinshuo Huang, Shuang Huang, Xiangling Li, Jing Liu, Jiang Yang, Jiefeng Xu, Xi Xie, Hui-Jiuan Chen
Summary: This study reported the development of a microneedle (MN) extraction system based on patterned electrodes for convenient and minimally invasive detection of bio-analytes. The system could detect corresponding bio-analytes in a minimally invasive manner without causing significant tissue damage. This work provides promising technology to expand the application of POCT for minimal tests on interstitial fluids.
BIOMATERIALS SCIENCE
(2023)
Article
Engineering, Electrical & Electronic
Cheng Yang, Zhiran Shen, Chuanjie Yao, Shuang Huang, Xinshuo Huang, Jingshan Mo, Chengduan Yang, Meiwan Chen, Hui-Jivan Chen, Tian Hang, Xi Xie, Fanmao Liu
Summary: This study focuses on the fabrication of flexible strain sensors using vertical graphene nanowalls (VG) and their applications in physiological assessment. The sensors were used to collect radial and carotid pulses as well as respiratory rate for risk assessment of cardiac bradycardia, arrhythmias, arrest, and artery stiffening. A wearable circuit was also designed and fabricated for portable physiological monitoring.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
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)
