Article
Materials Science, Ceramics
Ruoshui Liu, Lichen Wang, Xiang Yu, Zhiyi Xu, Huayang Gong, Tongyun Zhao, Fengxia Hu, Baogen Shen
Summary: The study demonstrates the enhancement of magnetocrystalline anisotropy (MA) in La-Co co-substituted strontium hexaferrite (La-Co SrM) due to the joint effect of Fe2+ and Co2+ ions. Co-substituted strontium hexaferrite SrFe12-xCoxO19 (Co-SrM) single crystals were grown to investigate the anisotropy of Co2+ single ions. The solubility of Co in this preparation condition is limited to 0.31, and for 0.03 < x <= 0.11, a 19% enhancement in uniaxial magnetic anisotropy field HA is observed, with only a 7% loss in saturation magnetization MS at 5 K. The enhanced HA of Co-SrM is even higher than that of La-Co SrM, making it suitable for use as permanent magnets in this concentration range. However, for x = 0.31, planar anisotropy is observed at 5 K. The potential nonlinear magnetic structure of Co-SrM remains to be discovered for magnetoelectric effects. This work serves as a significant complement to the magnetocrystalline anisotropy study of La-Co SrM.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Akanksha Gupta, Manoranjan Kar, P. K. Roy
Summary: Strontium hexaferrite is a hard magnet that can help develop rare-earth-free magnets. A composition of SrFe12-x-yNixAlyO19 was successfully synthesized and the effect of Ni-Al substitution on its properties was studied. The study showed significant improvements in magnetic and dielectric properties by adjusting the Ni and Al substitution.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Materials Science, Ceramics
Le-Zhong Li, Alexander Sokolov, Cheng-Ju Yu, Qi-Fan Li, Kun Qian, Vincent G. Harris
Summary: Y3+- and Co2+-substituted Sr1-xYxFe12-xCoxO19 (0 < x < 0.50) M-type hexaferrites were synthesized using a traditional oxide ceramic process to study their structural and static magnetic properties. The substitution of Y and Co affected the lattice parameters, density, saturation magnetization, and coercivities of the samples. The in-plane and out-of-plane coercivities showed different trends with increasing substitution amount, reaching a maximum squareness ratio at a specific substitution level.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Hankun Xu, Kun Lin, Wenjie Li, Qiang Li, Joerg C. Neuefeind, Jue Liu, Kenichi Kato, Jun Miao, Xianran Xing
Summary: In this study, the role of non-stoichiometry in second harmonic generation (SHG) in LiNbO3 was investigated by preparing non-stoichiometric LiNbO3 samples with different Li mole percentages. It was found that reducing the Li content to 47 mol% significantly weakened the SHG response by 50% without affecting the band gap. This effect was attributed to the introduction of anti-occupied Nb and Li vacancies, which reduced local distortions and polarizations of the octahedra, resulting in the decline of SHG response. These findings provide insights for the future design of functional materials with non-stoichiometric compositions.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Materials Science, Multidisciplinary
Yitong Liu, Yawen Fan, Milyutin Gleb, Xuefeng Liao, Jiasheng Zhang, Hongya Yu, Zhongwu Liu
Summary: The effects of wheel speed and heat treatment on melt-spun ternary Y2Fe14B alloy, as well as the influence of Nd substitution on structure, magnetic properties, and thermal stability, have been investigated. It was found that the optimum magnetic properties were achieved at a wheel speed of 36 m/s for Y2Fe14B alloy, and the magnetic properties of Nd-substituted alloys showed linear increase with Nd content.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Shereen Selvaraj, Uma Gandhi, L. John Berchmans, Umapathy Mangalanathan
Summary: Rare earth substituted strontium hexaferrite powders were synthesized through a molten salt route, showing improved magnetic properties in the substituted samples, with the samarium-doped sample exhibiting the highest magnetic measurements at room temperature. The temperature-dependent magnetic properties of strontium ferrites also showed potential for applications in magnetic field sensors as saturation magnetization and remanence increased with decreasing temperature.
MATERIALS TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Safia Anjum, Mehwish Sattar, Zeeshan Mustafa
Summary: The research investigated the impact of La+3 ions on the structural, morphological, optical, magnetic, and ferroelectric properties of barium hexaferrite samples. The study found that increasing La+3 ions led to a decrease in band energy and changes in magnetic properties, with lower polarizability in most samples suitable for high-frequency applications.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Multidisciplinary
Mah Rukh Rehman, Muhammad Aftab Akram, Iftikhar Hussain Gul
Summary: In this study, cobalt-substituted strontium hexaferrite nanoparticles were synthesized using the sol-gel route, and their magnetic, electrical, and structural properties were investigated. The results showed that cobalt doping increased the saturation magnetization and decreased the coercivity, while exhibiting semiconductor behavior. Additionally, the dielectric constant decreased with increasing cobalt content.
Article
Materials Science, Ceramics
Firdous Bibi, Shahid Iqbal, Humera Sabeeh, Tahira Saleem, Bashir Ahmad, Muhammad Nadeem, Imran Shakir, Muhammad Aadil, Ambreen Kalsoom
Summary: The micro-emulsion approach was used to fabricate rare earth and transition metal co-doped barium hexaferrite nanoparticles in this study. Characterization by FTIR, XRD, and SEM techniques confirmed the structural and morphological properties of the co-doped materials, which exhibited higher photocatalytic activities and improved magnetic properties compared to the undoped sample. This indicates the potential practical applications of the Nd-Cu co-doped barium hexaferrite sample in environmental remediation.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
A. A. Inishev, E. G. Gerasimov, A. M. Bartashevich, P. B. Terentev, V. S. Gaviko, N. V. Mushnikov
Summary: Crystal structure, magnetostriction, magnetic and magnetothermal properties have been studied for novel non-stoichiometric ErFe2Mnx (0 <= x <= 0.6) compounds. It has been found that manganese alloying influences the crystal structure, magnetic properties, and magnetothermal properties of the compounds, and also allows for the tuning of magnetocrystalline anisotropy and magnetostriction.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
M. A. Darwish, V. A. Turchenko, A. T. Morchenko, V. G. Kostishyn, A. V. Timofeev, M. I. Sayyed, Zhipeng Sun, S. V. Podgornaya, E. L. Trukhanova, E. Yu. Kaniukov, S. V. Trukhanov, A. V. Trukhanov
Summary: The study demonstrates that tin-substituted hexaferrites can be used for both electromagnetic shielding and absorbing materials, showing potential for absorbing electromagnetic radiation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Electrical & Electronic
Ahmad Gholizadeh, Vajihe Banihashemi
Summary: Microstructural, magnetic, and dielectric properties of Ca-Sm co-substituted strontium hexaferrites were investigated. The results showed that the co-substitution increased the saturation magnetization and coercive field. Impedance analysis also revealed a decrease in the mobility of charge carriers in the co-substituted samples.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Chemistry, Inorganic & Nuclear
Cong Zhang, Shuangjiu Feng, Xucai Kan, Yong Zhu, Zongyang Zhang, Yue Li, Haiming Tian, Wei Sun, Xiansong Liu
Summary: In this study, Al3+ ion substituted M-type Sr0.7La0.3Fe11.75.x-AlxCo0.25O19 (0 < x < 0.12) hexagonal ferrites were synthesized by solid state reaction. The lattice parameters a and c decreased with the increasing Al3+ content, and a single M-type strontium ferrite was obtained within the Al content range of 0 to 0.08. Scanning electron microscopy images showed hexagonal platelet-like particles, and the size of the magnetic powders was about 2-5 μm. The saturation magnetization (M-s) of the hexaferrite decreased with the increase of x from 0 to 0.12, while coercivity (H-c) of the magnetic powders increased with Al3+ content (x) from 0 to 0.12.
JOURNAL OF SOLID STATE CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Jack Thomas-Hunt, Amalie Povlsen, Harikrishnan Vijayan, Cecilie Gronvaldt Knudsen, Frederik H. Gjorup, Mogens Christensen
Summary: Aligned strontium hexaferrites were achieved using cold compacted, anisotropic shaped non-magnetically interacting precursors. The process of dry mixing platy hematite and/or rod-like goethite with strontium carbonate eliminated the need for external magnetic fields or high temperatures. The calcined strontium hexaferrite pellets exhibited preferred orientation and high phase purity. The combination of goethite and strontium carbonate achieved the highest degree of magnetic alignment.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Multidisciplinary
Lev A. Trusov, Anastasia E. Sleptsova, Jingtong Duan, Evgeny A. Gorbachev, Ekaterina S. Kozlyakova, Evgeny O. Anokhin, Artem A. Eliseev, Maxim A. Karpov, Alexander V. Vasiliev, Oleg A. Brylev, Pavel E. Kazin
Summary: A method to prepare nonsintered single-domain nanoparticles of chromium-substituted hexaferrite via crystallization of glass in the system SrO-Fe2O3-Cr2O3-B2O3 was successfully demonstrated, showing plate-like hexaferrite nanoparticles with diameters changing from 20 to 190 nm. Chromium substitution significantly improved the coercivity of the particles, ranging from 334 to 732 kA m(-1), providing a new strategy for producing high-coercivity ferrite nanomagnets.
Article
Chemistry, Physical
Isaac Haik Dunn, Silvia E. Jacobo, Paula G. Bercoff
JOURNAL OF ALLOYS AND COMPOUNDS
(2017)
Article
Materials Science, Multidisciplinary
Adrian A. Cristobal, Cinthia P. Ramos, M. Susana Conconi, Paula G. Bercoff, Pablo M. Botta
MATERIALS RESEARCH BULLETIN
(2017)
Article
Materials Science, Multidisciplinary
Fernando Meneses, Silvia E. Urreta, Juan Escrig, Paula G. Bercoff
CURRENT APPLIED PHYSICS
(2018)
Article
Chemistry, Physical
Fernando Meneses, Analia Pedernera, Cecilia Blanco, Noelia Bajales, Silvia E. Urreta, Paula G. Bercoff
JOURNAL OF ALLOYS AND COMPOUNDS
(2018)
Article
Chemistry, Analytical
Cecilia S. Tettamanti, Maria L. Ramirez, Fabiana A. Gutierrez, Paula G. Bercoff, Gustavo A. Rivas, Marcela C. Rodriguez
MICROCHEMICAL JOURNAL
(2018)
Article
Nanoscience & Nanotechnology
Lisandro Venosta, Noelia Bajales, Sergio Suarez, Paula G. Bercoff
BEILSTEIN JOURNAL OF NANOTECHNOLOGY
(2018)
Article
Chemistry, Physical
Jhon A. Castrillon Arango, Adrian A. Cristobal, Cinthia P. Ramos, Paula G. Bercoff, Pablo M. Botta
JOURNAL OF ALLOYS AND COMPOUNDS
(2019)
Article
Materials Science, Multidisciplinary
Maria del Carmen Aguirre, Silvia E. Urreta, Paula G. Bercoff
Summary: The magnetization reversal mechanisms in electrodeposited Co100-xFex (x = 0; 20; 30; 50) films were investigated. The films containing iron showed thinner thickness, lower texture, and smaller grain size, leading to larger coercivities. The angular dependence of coercivity exhibited a transition from domain wall depinning to inverse domain nucleation inside the grains.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
M. Victoria Bracamonte, Lisandro F. Venosta, W. Gustavo Fano, Silvia E. Jacobo, Paula G. Bercoff
Summary: This work aims to obtain and characterize a composite material using environmentally friendly matrix and green processes, comparing properties through different preparation methods. Chemical synthesis followed by heat-treatment results in improved crystallinity and magnetization, with a small amount of Ni NPs enhancing microwave absorption properties of graphite, extending its application to lower frequencies.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2022)
Article
Materials Science, Multidisciplinary
Fernando Meneses, Julieta S. Riva, Silvia E. Urreta, Paula G. Bercoff
Summary: By adjusting the electrodeposition parameters, the morphology and composition of Pd-Ni alloy deposits can be controlled. Deposits with higher electrodeposition potential and lower Pd content exhibit more efficiency and refinement. The alloy shows soft ferromagnetic properties at room temperature with significant remanence and coercivity, affected by the alloy composition.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Heber E. Andrada, Lisandro Venosta, Silvia E. Jacobo, O. Fernando Silva, R. Dario Falcone, Paula G. Bercoff
Summary: In this study, magnetic vesicles were successfully produced and coated with chitosan to improve their stability and biocompatibility. The vesicles were able to load and release an antitumor drug with delayed release profiles. Additionally, the vesicles showed good response to an external magnetic field, making them potential candidates for field-assisted therapies.
Article
Materials Science, Multidisciplinary
Joaquin Almeira, Fernando Meneses, Julian Milano, Carlos Ramos, Silvia E. Urreta, Paula G. Bercoff
Summary: The effective magnetic anisotropy field Heff of Fex Ni(100-x) (x = 15, 25, 38) nanowires within dense alumina templates of-35% porosity was determined using different methods including magnetization evolution, ferromagnetic resonance, and magnetization switching. The results showed variations in Heff values depending on the determination method, with the values from magnetization measurements being quite smaller than those from FMR measurements. It was suggested that new internal degrees of freedom need to be considered to describe the effective anisotropy in different processes.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Fernando Meneses, Fabiana A. Gutierrez, Silvia E. Urreta, Paula G. Bercoff, Marcela C. Rodriguez
Summary: A single-step electrochemical procedure for synthesizing a brush-like platform and studying its hysteresis properties and electrochemical response is described in this study. It is demonstrated that the direction of the magnetic easy axis of the brush-like architecture can be tailored, and the coercivity and remanence of the magnetic system can be controlled. The presence of an applied magnetic field enhances the electrode charge-transfer response of the Ni nanobrush, which is attributed to a larger electroactive area.
JOURNAL OF SCIENCE-ADVANCED MATERIALS AND DEVICES
(2022)
Article
Chemistry, Physical
Elisa Herrera, Julieta Riva, Soledad Aprea, O. Fernando Silva, Paula G. Bercoff, Alejandro M. Granados
Summary: In this study, the catalytic performance of FePd nanowires with different compositions was investigated through functionalization and analysis of reaction rate constants. The results showed that Fe55Pd45 nanowires exhibited the highest catalytic activity, while Fe65Pd35 nanowires showed similar performance despite their lower Pd content. The presence of Fe atoms and the formation of an fcc phase in the alloy may contribute to the synergistic effect on catalytic activity.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Electrochemistry
M. Victoria Bracamonte, Emiliano N. Primo, Guillermina L. Luque, Lisandro Venosta, Paula G. Bercoff, Daniel E. Barraco
ELECTROCHIMICA ACTA
(2017)
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)
