Article
Polymer Science
M. Sivaram Prasad, B. B. V. S. Vara Prasad, K. V. Ramesh, B. Rajesh Babu
Summary: Nanocrystalline chromium substituted Ni-Zn nanoferrites were synthesized and characterized for their electrical and magnetic properties through sintering. The results showed changes in structure and properties with chromium substitution, and FT-IR spectra analysis indicated the spinel structure characteristics.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2021)
Article
Chemistry, Inorganic & Nuclear
Y. Shireesha, V. Rajesh, Yenda Srinivasa Rao, Ganimisetti Srinivasa Rao
Summary: Mg0.5Ni0.5Fe2-xCrxO4 (x = 0.0, 0.2, 0.4, and 0.6) ferrites were synthesized using the solid-state reaction route. The synthesized materials' crystal structure, microstructure, crystallite size, magnetic and resistivity properties were measured using XRD, SEM, FT-IR spectroscopy, VSM, and DC electrical resistivity measurements. The results showed that the synthesis was efficient and resulted in improved crystallite sizes in a single-phase cubic spinel structure. The addition of chromium ions resulted in changes in lattice constant, crystallite size, saturation magnetization, remanent magnetization, and coercivity.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Lubos Nagy, Adriana Zelenakova, Pavol Hrubovcak, Michael Barutiak, Maksym Lisnichuk, Jozef Bednarcik, Jana Vargova, Rastislav Jendzelovsky, Juraj Sevc, Stefan Vilcek
Summary: Fine CoFe2O4 nanoparticles with citric acid capping were synthesized under different pH conditions. Lower pH led to the formation of a thicker citric acid shell and weaker inter-particle interactions, while higher pH resulted in a thinner organic coating and stronger interactions, leading to the formation of larger agglomerates with pomegranate-like structure.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
K. E. Rady, Ahmed Abo Arais, K. M. El-Shokrofy, M. S. Shams
Summary: This study investigates the role of Gd3+ ions in a novel spinel ferrite with a general composition of Mn0.9Zn0.1Ni0.05Ti0.05GdxFe1.9-xO4; 0.0 <= x <= 0.04, and determines the critical concentration of Gd3+ ions that improves the structural and dielectric properties of the ferrite. The study finds that increasing the Gd concentration enhances the physical and dielectric properties of the samples, with an increase in AC resistivity and a 68% reduction in dielectric loss.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Review
Materials Science, Multidisciplinary
Syed Ismail Ahmad
Summary: Instruments and devices based on magnetic materials are essential in modern culture, with ferrites being the leading materials. Cobalt ferrite (CFO) has versatile applications, attracting attention for its high anisotropy and Curie temperature. Different elements can be incorporated into CFO spinel matrix for tailored properties. The review covers types of ferrites, structural properties, and the effects of doping on CFO performance, focusing on recent research on CFO Nanoparticles.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Review
Chemistry, Inorganic & Nuclear
Roman Boca, Cyril Rajnak
Summary: Slow magnetic relaxation is a common feature in magnetic materials, with the relaxation time determined by high spin reversal barriers and molecular spin. Recent experimental data has shown slow magnetic relaxation in systems with positive, small or negligible D. Some materials exhibit multiple relaxation channels.
COORDINATION CHEMISTRY REVIEWS
(2021)
Article
Physics, Multidisciplinary
A. M. Faramawy, G. Mattei, C. Scian, H. Elsayed, M. I. M. Ismail
Summary: Nanoparticles of CrxAl0.5-xCoFe1.5O4 spinel ferrites were synthesized by co-precipitation technique to study the effects of chromium and aluminum ion substitutions on structure, magnetic properties, permeability, Curie temperature, and AC loss. The results showed that lattice constant and porosity increased with higher Cr3+ concentration, while magnetization, coercivity, and Curie temperature decreased. Additionally, magnetic loss increased with increasing Cr3+ concentration in all samples.
Article
Materials Science, Ceramics
Jie Xu, Xuanning Zhang, Shaoxiong Fan, Yuncheng Li, Yaqi Wang, Shi-Long Gao, Yun-Ze Long, Yongcheng Zhang, Xia Wang, Derang Cao, Shandong Li, Jie Xu
Summary: In this work, Zn-doped magnetic nanoparticles of CoZnxFe2-xO4 were prepared and it was found that Zn doping greatly improved the piezomagnetic coefficient of the nanoparticles. Composite films of P(VDF-TrFE)/CoZn0.1Fe1.9O4 were prepared and exhibited the highest ME voltage coefficient reported in the literature for polymer-based ME composite films.
CERAMICS INTERNATIONAL
(2023)
Article
Green & Sustainable Science & Technology
Yi Wang, Yuwei Li, Chen Wang, Jianye Tao
Summary: This paper proposes a hybrid arm-multiplexing modular multilevel converter (HAM-MMC), considering both the DC fault ride-through (FRT) and lightweight requirements of MMC. The time-division multiplexing of middle arms between upper and lower arms is achieved by introducing arm selection switches, which considerably enhances the submodule utilization and thus minimizes the submodule number. Simulation results demonstrate that the proposed HAM-MMC can smoothly ride through DC voltage dip without interrupting power transmission, and can also rapidly resume normal operation after a zero-voltage disturbance.
IET RENEWABLE POWER GENERATION
(2023)
Article
Materials Science, Multidisciplinary
K. Chandramouli, B. Suryanarayana, P. V. S. K. Phanidhar Varma, Vemuri Raghavendra, K. A. Emmanuel, Paulos Taddesse, N. Murali, Tulu Wegayehu Mammo, D. Parajuli
Summary: Complex ferrite nanoparticles were synthesized using sol-gel auto combustion technique. X-ray diffraction (XRD) analysis confirmed a single-phase cubic spinel structure with Fd-3m space group. The samples exhibited semiconductor properties with decreasing DC resistivity as temperature increased. Vibrating sample magnetometer (VSM) was used to characterize magnetic features.
RESULTS IN PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
P. V. Prasanna Kumar, B. Suryanarayana, Vijaya Lakshmi Vemula, D. Jagadeeswara Rao, Susmitha Uppugalla, Y. Ramakrishna
Summary: La3+, Sm3+, Nd3+, and Gd3+ substituted Co-Ni system ferrite materials were synthesized using the solid-state reaction method. XRD, SEM, FTIR, DC electrical resistivity, and VSM studies were conducted. The results showed that RE3+ ions substituted Fe3+ ions in the B sites, and the samples exhibited a spinel structure. The lattice parameter of the substituted ferrites increased with the ionic size of the RE ions. SEM analysis indicated that the samples were agglomerated and almost spherical. The FTIR absorption bands confirmed the presence of spinel ferrites. D.C. electrical resistivity and saturation magnetization increased with the substitution of RE3+ ions.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Chemistry, Physical
J. Kastil, J. Kamarad, M. Friak, M. Misek, U. Dutta, P. Kral, O. Kaman, Z. Arnold
Summary: The Ni2.01Mn1.58Sn0.41 alloy undergoes a diffusionless structural transition and exhibits complex magnetic and electronic structures. It shows a spin-glass state below 155 K and has clusters with strong interactions. The alloy also displays anomalous Hall effect and a positive ordinary Hall coefficient. The electrical resistance shows a flat maximum at the spin-glass transition temperature. Quantum mechanical calculations reveal local chemical variations and clustering in the alloy.
Article
Materials Science, Multidisciplinary
Omar Rejaiba, Fakher Hcini, Maria Nasri, Bandar Alzahrani, Mohamed Lamjed Bouazizi, E. K. Hlil, Jabeur Khelifi, Kamel Khirouni, Essebti Dhahri
Summary: The CuFeCr0.5Ni0.5O4 (CFO) compound was successfully synthesized using sol-gel reaction combustion technic, and the study revealed a non-Debye type relaxation phenomenon in the sample, leading to complex electrical transport properties.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Physics, Applied
S. Kuswanth Kumar, M. S. N. A. Prasad, A. Rama Krishna, B. Vikram Babu, B. Sathish Mohan, M. P. Rao, K. Samatha
Summary: Ferrites made of copper substituted Mg0.6-xZn0.4CuxFe2O4 (x = 0.0, 0.1, 0.2 and 0.3) exhibit high resistivity and magnetism. XRD, SEM, FT-IR, VSM, and dc electrical resistivity techniques were used to evaluate their structural, compositional, morphological, and functional characteristics. They possess a spinel structure in the Fd-3m space group, with particle sizes ranging from 1 to 1.56 μm after calcination at 1000°C. FT-IR analysis confirmed the spinel structure through absorption bands at 570-576 cm(-1) and 424-430 cm(-1) for higher and lower frequencies, respectively. The coercivity coefficient varies from 73.33 to 154.7 Oe depending on the composition, and the highest DC electrical resistivity is 10(6) Ω-cm at x = 0.1.
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
(2023)
Article
Biochemistry & Molecular Biology
Mahwish Afzia, Rafaqat Ali Khan, Bushra Ismail, Magdi E. A. Zaki, Talal M. Althagafi, Abdulaziz A. Alanazi, Afaq Ullah Khan
Summary: The structural, magnetic, and dielectric properties of spinel cobalt ferrite doped with Li1+/Zn2+ were explored through detailed study. The co-doped samples with a dopant concentration of x = 0.3 exhibited the best magnetic properties, while the dielectric properties decreased. These samples show potential as candidates for magnetic recording devices.
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)