Article
Geochemistry & Geophysics
D. Elhanati, R. Issachar, T. Levi, R. Weinberger
Summary: Magnetic fabric analyses using AMS are a powerful tool in geological research, allowing for identification of dominant magnetic phases through measurements at different temperatures and providing a reliable method for geological interpretation in complex settings.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Chemistry, Physical
Lihua Lin, Xiaoxue Ye, Hongzhe Pan, Fushan Li, Youwei Du
Summary: Graphdiyne can exhibit room-temperature ferromagnetism through dual-doping with fluorine and hydroxyl groups. The intensity of this magnetic property can be modulated by adjusting the levels of dual-doping. Experimental and theoretical analyses reveal crucial factors influencing the dual-doping effect.
CHEMISTRY OF MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Fei Yang, Pu Liu, Changwei Wu, Dao-Xin Yao, Guowei Yang
Summary: The study reports the paramagnetism of a new type of carbon material - carbyne, showing collective magnetism but no magnetic ordering at different temperatures. This collective magnetism is likely originated from the local magnetic moments generated by hydrogen atom adsorbed on the carbon chain and vacancies.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
A. V. Nikolaev, M. Ye. Zhuravlev, L. L. Tao
Summary: This study analyzes the magnetic contributions of diamond, silicon, and germanium using an ab initio approach, and discusses the partial diamagnetic contributions of core and valence electrons. The results are consistent with experimental values.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
F. R. Pratama, M. Shoufie Ukhtary, Riichiro Saito
Summary: Theoretical study on the dependence of magnetizations in Dirac fermions on magnetic field, temperature, and energy band-gap, as well as the effects of impurities on orbital susceptibility of graphene are conducted in this research. It is shown that in the presence of impurity, the susceptibility follows a scaling law. Additionally, robust magnetization with respect to temperature and impurity in the case of massive Dirac fermions is demonstrated.
Article
Materials Science, Multidisciplinary
Yuriy Yerin, V. P. Gusynin, S. G. Sharapov, A. A. Varlamov
Summary: This study provides a detailed analysis of the electron spectrum, persistent currents, and their densities for an annulus placed in a constant magnetic field. The evolution of persistent currents in different geometries is studied, along with the confirmation of analytical results through current density integration and the ByersYang formula. The research is valuable for accurate treatment and interpretation of experimental data in various doubly connected systems.
Article
Materials Science, Multidisciplinary
Md. Abdur Rashid, Masahiko Higuchi, Katsuhiko Higuchi
Summary: In this study, a numerical investigation was conducted on the Hall conductance of graphene using a nonperturbative magnetic-field-containing relativistic tightbinding approximation method. The study revealed two types of plateaus in the dependence of Hall conductance on Fermi energy, namely wide plateaus and narrow plateaus. The wide plateaus show half-integer quantum Hall effect and their width decreases with increasing filling factors, exceeding the decrease expected from the linear dispersion relation of graphene. The narrow plateaus, on the other hand, correspond to energy gaps caused by spin-Zeeman effect and spin-orbit interaction.
Article
Physics, Condensed Matter
Anasua Khan, Sarita Rajput, M. Anas, V. K. Malik, T. Maitra, T. K. Nath, A. Taraphder
Summary: By combining experimental investigations and first-principles density functional theory calculations, the physical and magnetic properties of Gd-substituted Y2CoMnO6 double perovskite are studied. The properties are strongly influenced by spin configurations driven by antisite disorder. Multiple magnetic transitions, including paramagnetic to ferromagnetic transition and antiferromagnetic transition, are observed. The change in magnetization below a certain temperature is primarily attributed to Gd ordering. The absence of spin-glass or cluster-glass phases and the presence of a significant exchange bias effect are confirmed.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2022)
Article
Materials Science, Multidisciplinary
Soshun Ozaki, Masao Ogata
Summary: The orbital-Zeeman (OZ) cross term in the magnetic susceptibility, which represents the cross term of spin Zeeman and orbital effect, is evaluated accurately for the Kane-Mele model using a newly developed formulation. This method considers infinite high-energy bands and core electron contributions at any chemical potential. It is found that the effect beyond previous formulations does not alter the quantization of the OZ cross term. Additionally, the OZ cross term in the metallic case and the sum rule with respect to the chemical potential are studied, along with the possibility of experimentally detecting the quantization.
Article
Physics, Applied
Thinh Q. Bui, Adam J. Biacchi, Cindi L. Dennis, Weston L. Tew, Angela R. Hight Walker, Solomon I. Woods
Summary: Accurate characterization of the magnetization dynamics of single-domain magnetic nanoparticles is crucial for magnetic particle imaging, magnetic resonance imaging, and medical diagnostic/therapeutic technologies. In this study, we demonstrate the specific relaxation processes of iron oxide nanoparticles using time and frequency domain techniques, and investigate the fast dynamics at timescales relevant to magnetic particle imaging.
APPLIED PHYSICS LETTERS
(2022)
Article
Physics, Multidisciplinary
A. Safdar, A. Mushtaq, Amin Esmaeili, M. Ikram, Nauman Sadiq
Summary: This study investigates magnetosonic waves in quantum degenerate electron-ion plasma, considering the effects of degenerate pressure, Landau diamagnetic levels, and Pauli spin magnetization in the presence of a strong magnetic field. The research explores new propagation modes of quantum plasmas, with quantum effects impacting the Alfven mode propagation. The incorporation of quantum effects through various factors provides a basis for studying astrophysical plasma environments in compact systems like white dwarfs and neutron stars.
Article
Physics, Multidisciplinary
Masao Ogata, Soshun Ozaki, Hiroyasu Matsuura
Summary: The anomalous spin transport coefficients of gapped Dirac electrons are studied in the context of a quasi-two-dimensional organic conductor alpha-(BETS)(2)I-3. In the presence of spin-orbit interaction-induced gap, the effective Hamiltonian is found to be similar to the model considered by Kane and Mele plus additional tilting. Using this effective Hamiltonian, the conductivity tensors up to the linear order of the applied magnetic field are analytically obtained using microscopic linear response theory or Kubo formula. It is shown that the spin Hall conductivity and anomalous diagonal spin conductivity, which are written in terms of the Berry curvature and orbital magnetic moment, become nonzero in this system. The estimated values of spin conductivities with typical parameters are comparable to the spin Hall conductivity in Pt.
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
(2022)
Article
Multidisciplinary Sciences
Nico Huber, Valentin Leeb, Andreas Bauer, Georg Benka, Johannes Knolle, Christian Pfleiderer, Marc A. Wilde
Summary: After a century of research, the low-energy excitations in metals, which have been explained well by effective single-particle theories, now raise questions about spectroscopic signatures beyond single-particle, single-band behavior. This study identifies quantum oscillations in the topological semimetal CoSi that deviate from standard descriptions in two fundamental aspects. The findings are in agreement with generic model calculations and can help identify and measure correlation phenomena in various materials.
Article
Physics, Fluids & Plasmas
M. Muhsin, M. Sahoo
Summary: We study the dynamics of an inertial active particle in a thermal environment and find that the presence of a magnetic field has an impact on the particle's displacement and velocity, particularly when the particle is confined in a harmonic trap. The strength of the magnetic field alters the overall displacement of the particle, leading to either saturation or suppression of the displacement. Interestingly, we observe that in the time asymptotic limit, both the confined and free particles exhibit behavior that is independent of the particle's activity and the persistence of noise correlation.
Article
Materials Science, Multidisciplinary
D. O. Oriekhov, V. P. Gusynin, V. M. Loktev
Summary: The paper investigates the tight-binding model of square-octagon lattice, revealing the existence of high-order van Hove points in the model's spectrum. Analysis of the orbital susceptibility of electrons shows strong responses due to different types of VHS in the density of states, leading to a phase transition from dia- to paramagnetic at a hopping ratio of alpha approximately 0.94. The results are compared with a low-energy effective pseudospin-1 model near the three band touching point.
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)