Article
Materials Science, Multidisciplinary
Ziyu Yang, Jun-Yi Ge, Shuangchen Ruan, Hongzhi Cui, Yu-Jia Zeng
Summary: The study reveals that the distorted double-perovskite Gd2ZnTiO6 shows promising magnetocaloric properties as a potential refrigerant material for the liquefaction of helium, with significant magnetic entropy change and cooling power compared to traditional refrigerants.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Materials Science, Multidisciplinary
Lu Tian, Bo Xu, Huan Chen, Zhaojun Mo, Zhenxing Li, Guodong Liu, Jun Shen
Summary: Based on experimental and theoretical results, the magnetic properties, magnetic phase transitions, and magnetocaloric effect (MCE) of TmNi2Si2 were studied. It was confirmed that TmNi2Si2 undergoes a field-induced phase transition from meta-magnetic to ferromagnetic under magnetic fields exceeding 0.2 T. A large reversible cryogenic MCE was observed, with a maximum magnetic entropy change (-?S-M(max)) of 15.4 J kg(-1) K-1 and a refrigeration capacity of 68.0 J kg(-1) when changing the magnetic field from 0 to 2 T. The observed reversible MCE under low magnetic field change indicates the potential application of TmNi2Si2 in cryogenic magnetic refrigerators.
SCIENCE CHINA-MATERIALS
(2023)
Article
Chemistry, Physical
Raja Das, R. Prabhu, N. Venkataramani, Shiva Prasad, Ling Li, Manh-Huong Phan, Veerle Keppens, David Mandrus, Hariharan Srikanth
Summary: The study demonstrates the enhancement of magnetic entropy change and refrigerant capacity in a nanocrystalline EuTiO3 film compared to its single crystal counterpart. A new approach for improving both magnetocaloric effect (MCE) and refrigerant capacity (RC) in magnetic nanomaterials is proposed, stimulating further research in magnetocaloric thin films and related cooling devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Xuan Wu, Yanyun Deng, Shuting Wu, Xin Chen, Xiaolin Hu, Naifeng Zhuang
Summary: The synthesis of non-rare-earth bismuth-iron crystals via hydrothermal method showed that with increasing iron content, the lattice parameters decrease, magnetization intensity increases, and the maximum magnetic entropy change also improves.
Article
Chemistry, Physical
Quanyi Liu, Junfeng Wang, Huicai Xie, Qi Fu, XinQiang Gao, Zhenxing Li, JinLiang Zhao, Zhaojun Mo
Summary: A modified solid-phase reaction method was used to synthesize polycrystalline Eu3B2O6 as a novel cryogenic magnetocaloric material. The magnetocaloric effect, magnetic properties, and crystal structure of the compound were investigated. The compound undergoes a second-order magnetic-phase transition from ferromagnetic to paramagnetic at 8 K and has a hexagonal structure belonging to the R-3c space group. The compound exhibits a high magnetic entropy change, temperature averaged entropy change, and refrigeration capacity, making it a promising candidate for cryogenic magnetic refrigeration.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Shouying Cao, Chenpeng Fan, Mengwen Lu, Meng Li, Yuhang Zhou, Hongxia Wang, Qingfang Lin, Lili Liang
Summary: Two coordination polymers with a three-dimensional framework based on Ln(7) units were synthesized. They consist of garland-shaped Ln(7) building units with a zigzag arrangement and one-dimensional round channels. 1Gd exhibits a good magnetocaloric effect, with a significant -Delta S-m(max) at 3K and Delta H = 7T due to the larger mass ratio and increased magnetic density of the 3D structure.
Article
Materials Science, Multidisciplinary
Bangfeng Zong, Xiansong Liu, Xucai Kan, Chaocheng Liu
Summary: The demand for environmentally friendly and energy-efficient refrigeration technology is increasing due to sustainable development. Magnetic refrigeration, specifically the antiperovskite compound Sn0.6NFe3.4, shows potential for application in this field. This study explores the crystal structure, magnetic properties, and magnetocaloric effect (MCE) of Sn0.6NFe3.4, revealing significant characteristics such as a suitable paramagnetic Curie temperature, a sharp transition process from ferromagnetic to paramagnetic phase, and a large magnetization. The material exhibits a wide distribution of magnetic entropy change and achieves a high relative cooling power at a magnetic field change of 45 kOe. Compared to other conventional magnetic refrigeration materials, Sn0.6NFe3.4 demonstrates a considerable MCE and offers a more affordable price advantage. These findings are expected to attract researchers' attention towards the development of magnetic refrigeration devices.
MATERIALS TODAY COMMUNICATIONS
(2023)
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
Chemistry, Multidisciplinary
Changqing Zhou, Rukang Li
Summary: The newly obtained compound Gd3TeBO9 has a high Gd3+ concentration and a large magnetic entropy change, showing its potential for further development as a magnetocaloric material.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Physical
Xuanwei Zhao, Xianming Zheng, Ji Qi, Xiaohua Luo, Shengcan Ma, Sajjad Ur Rehman, Weijun Ren, Changcai Chen, Zhenchen Zhong
Summary: The antiferromagnetic HoNiGe3 single crystal grown by Ge flux method exhibits anisotropic magnetocaloric effect and magnetoresistance, with spin-flip and spin-flop transitions occurring along different orientations. The maximum magnetic entropy changes and refrigeration capacity show HoNiGe3 to be a promising candidate for novel rotating magnetic refrigeration at low temperatures.
Article
Physics, Applied
P. D. Lalita, P. D. Babu, Pardeep, G. A. Basheed
Summary: The magnetocaloric properties of hexagonally structured Mn5-xFexGe3 (x=0.15, 0.3, and 0.5) alloys were investigated in this study. The alloys exhibited high entropy change, adiabatic temperature change, and refrigerant capacity. Furthermore, doping with Fe improved the coefficient of refrigerant performance.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Chemistry, Physical
Turkiya M. Al-Shahumi, Imaddin A. Al-Omari, Salim H. Al-Harthi, Myo Tay Zar Myint, Parashu Kharel, Suvechhya Lamichhane, Sy-Hwang Liou
Summary: Single-phase La0.7Sr0.3Mn1-xFexO3 perovskites were synthesized by sol-gel method and had a rhombohedral structure with a slight change in lattice parameters and unit cell volume. The average particle size ranged from 43-70 nm. The samples exhibited a ferromagnetic to paramagnetic second-order magnetic phase transition at TC, which decreased linearly with Fe doping. XPS measurement confirmed the oxidation states of Fe and La as +3 and a mixed valence state of Mn4+/Mn3+. The Fe substitution suppressed the saturation magnetization and blocking temperature, while (-4SM)max decreased with increasing Fe content. The sample with x = 0.08 showed a Curie temperature of 297 K, the highest relative cooling power (RCP) of 153 J/kg, and (-4SM)max value of 1.46 J/kg.K at mu o4H = 2.8 T. The La0.7Sr0.3Mn1-xFexO3 manganites are potential candidates for room-temperature magnetic refrigeration applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Guiquan Yao, Yinde Yu, Jiaxin Yang, Jie Zhu, Sen Yang, Weibin Cui
Summary: The crystal structure, magnetic phase transition, and magnetocaloric effect of R5CoSb2 (R = Pr, Nd, Gd-Er) alloys were investigated. The alloys undergo a ferromagnetic-paramagnetic transition under certain conditions and exhibit significant magnetocaloric effects near the phase transition temperature.
Article
Chemistry, Physical
Hongchang Wang, Pengqiang Hu, Zhengming Zhang, Dunhui Wang
Summary: Magnetostructural coupling materials have excellent magnetocaloric properties and are ideal candidates for magnetic refrigerants. By adding Co into the Ge site of Tb5Si2Ge2, a strong magnetostructural coupling can be achieved, significantly improving the magnetocaloric properties of the compound. Experimental results show that the magnetic entropy change and temperature-averaged entropy change are increased after Co doping, indicating an enhanced low-field magnetocaloric performance. Theoretical calculations also confirm a large lattice entropy change after the magnetostructural transformation. These findings demonstrate that Co doping can transform Tb5Si2Ge2 into an excellent magnetic refrigerant.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Applied
A. Eloua, S. Derkaoui, R. Moubah, A. Tizliouine, A. Charkaoui, H. Lassri
Summary: In this study, the magnetocaloric effect of commercial Er2O3 powders was investigated, showing promising potential as a magnetic refrigerant at low temperatures due to its large magnetic entropy change and refrigerant capacity. The material exhibits significant adiabatic temperature change under magnetic field variations, making it a candidate for efficient cooling applications.
JOURNAL OF RARE EARTHS
(2021)
Article
Physics, Condensed Matter
Markus Morgenstern, Christian Pauly, Jens Kellner, Marcus Liebmann, Marco Pratzer, Gustav Bihlmayer, Markus Eschbach, Lukacz Plucinski, Sebastian Otto, Bertold Rasche, Michael Ruck, Manuel Richter, Sven Just, Felix Luepke, Bert Voigtlaender
Summary: This article reviews the contributions of surface science methods to the discovery and improvement of 3D topological insulator materials, with examples from the authors’ work. It highlights the significance of spin-polarized angular-resolved photoelectron spectroscopy in demonstrating the spin-helical surface Dirac cone and discovering novel types of topological insulators. Additionally, it introduces procedures for spatially mapping potential fluctuations and identifying topological edge states in weak topological insulators.
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
D. P. Kozlenko, V. Yu Yushankhai, R. Hayn, M. Richter, N. O. Golosova, S. E. Kichanov, E. Lukin, B. N. Savenko
Summary: The rare-earth Tb metal undergoes a structural phase transition from hcp to Sm-type phase under high pressures, resulting in changes in its magnetic properties. Density functional theory calculations support the experimental findings and provide estimates for volume collapse and transition pressures in real materials.
PHYSICAL REVIEW MATERIALS
(2021)
Article
Physics, Condensed Matter
Eduardo Carrillo-Aravena, Kati Finzel, Rajyavardhan Ray, Manuel Richter, Tristan Heider, Iulia Cojocariu, Daniel Baranowski, Vitaliy Feyer, Lukasz Plucinski, Markus Gruschwitz, Christoph Tegenkamp, Michael Ruck
Summary: This study discovers a new layered salt Bi12Rh3Cu2I5 with weak 3D topological insulator characteristics, and finds that the presence of copper cations prevents strong coupling between the layers. The results are confirmed through calculations and experiments.
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Rajyavardhan Ray, Banasree Sadhukhan, Manuel Richter, Jorge I. Facio, Jeroen van den Brink
Summary: Even if Weyl semimetals are characterized by quasiparticles with well-defined chirality, the experimental exploitation of this feature is severely limited by pairs of Weyl lattice fermions with opposite chirality, causing the net chirality to vanish. However, this issue can be overcome when both time-reversal and inversion symmetry are broken. By investigating chirality in the carbide family RMC2, we found several members to be Weyl semimetals and demonstrated in NdRhC2, a noncentrosymmetric ferromagnet, that an odd number of Weyl nodes can be stabilized at its Fermi surface by tilting its magnetization. The resulting chiral configuration leads to topological phase transitions and interesting chiral electromagnetic responses, and the tilt direction determines the sign and strength of the net chirality.
NPJ QUANTUM MATERIALS
(2022)
Article
Physics, Applied
Nan N. Liu, Alexander P. Pyatakov, Mikhail N. Zharkov, Nikolay A. Pyataev, Gleb B. Sukhorukov, Yulia A. Alekhina, Nikolai S. Perov, Yurii K. Gun'ko, Alexander M. Tishin
Summary: This study demonstrates a superquadratic dependence of Specific Absorption Rate (SAR) on a magnetic field by using Zn-Mn ferrite nanoparticles, offering the potential to achieve higher SAR values in biomedicine.
APPLIED PHYSICS LETTERS
(2022)
Article
Biochemistry & Molecular Biology
Oleg A. Kulikov, Mikhail N. Zharkov, Valentin P. Ageev, Denis E. Yakobson, Vasilisa Shlyapkina, Andrey Zaborovskiy, Vera I. Inchina, Larisa A. Balykova, Alexander M. Tishin, Gleb B. Sukhorukov, Nikolay A. Pyataev
Summary: In this study, we developed iron oxide nanoparticles stabilised with oleic acid/sodium oleate that could exert therapeutic effects for curing tumors via magnetic hyperthermia. The toxicity of the synthesised composition was examined in vivo and found to be negligible. The efficiency of magnetic hyperthermia for the treatment of transplanted Walker 256 carcinoma was evaluated, showing a significant increase in survival rate.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Materials Science, Multidisciplinary
N. N. Liu, A. P. Pyatakov, A. M. Saletsky, M. N. Zharkov, N. A. Pyataev, G. B. Sukhorukov, Y. K. Gun'ko, A. M. Tishin
Summary: This study aims to improve the heat release efficiency of magnetic nanoparticles (MNPs) and address the side effects in medical techniques. Through the research on zinc manganese ferrite nanoparticles, the authors discovered a nontrivial dependence of heat release on the amplitude of the AC magnetic field and proposed a new optimization strategy.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Tatiana Kiseleva, Rashad Abbas, Kirill Martinson, Aleksei Komlev, Evgenia Lazareva, Pavel Tyapkin, Evgeniy Solodov, Vyacheslav Rusakov, Alexander Pyatakov, Alexander Tishin, Nikolai Perov, Enkhnaran Uyanga, Deleg Sangaa, Vadim Popkov
Summary: This paper reports the experimental investigation of submicron Y3Fe5O12 garnet particles obtained by solution combustion synthesis (SCS) and discusses the interdependence of crystal and magnetic structure peculiarities and size's influence on its functional magnetothermal performance.
Article
Pharmacology & Pharmacy
Olga A. Sindeeva, Arkady S. Abdurashitov, Pavel Proshin, Alexey Kadrev, Oleg A. Kulikov, Boris M. Shaparov, Nikolay Sorokin, Valentin P. Ageev, Nikolay A. Pyataev, Aleksandr Kritskiy, Alexander Tishin, Armais A. Kamalov, Gleb B. Sukhorukov
Summary: Bladder neck contracture is a complication of prostate surgery that can cause urinary blockage. Current treatment requires multiple surgeries with uncertain outcomes. A study has developed a biocompatible coating that releases medication under ultrasound guidance, and showed its safety in animal experiments.
Article
Engineering, Electrical & Electronic
Nan N. Liu, Yulia A. Alekhina, Alexander P. Pyatakov, Nikolai S. Perov, Boris B. Kovalev, Gleb B. Sukhorukov, Alexander M. Tishin, Tomomasa Moriwaki, Kenta Nakazawa, Yuko Ichiyanagi
Summary: The magnetic and magnetothermal properties of annealed Zn0.2Mn0.8Fe2O4 nanoparticles with a diameter ranging from 9 to 35 nm were investigated and compared with unannealed Zn0.2Mn0.8Fe2O4 magnetic nanoparticles. Both types of nanoparticles exhibited a single-phase spinel structure. It was found that the specific absorption rate (SAR) of the large annealed nanoparticles was proportional to the amplitude of the magnetic field, similar to H-4. However, the unannealed nanoparticles showed a superquadratic dependence SAR similar to H-5 starting from 13 nm. The change in the SAR(d) relationship can be explained by the low hysteresis area of small annealed nanoparticles and the dominant role of Neel relaxation in these annealed Zn0.2Mn0.8Fe2O4 nanoparticles.
IEEE MAGNETICS LETTERS
(2023)
Article
Chemistry, Multidisciplinary
O. A. Golovnia, A. G. Popov, N. V. Mushnikov, A. V. Protasov, K. G. Pradeep, A. V. Ogurtsov, D. V. Taranov, A. M. Tishin
Summary: This paper presents methods and approaches for producing high-temperature permanent magnets using Sm-Co-Fe-Cu-Zr alloys. The study shows that the content of Sm, Cu, and Fe significantly affects the coercivity value at high temperatures. Increasing the Sm content and decreasing the Fe content lead to an increase in coercivity at high temperatures. The optimal chemical composition for high-temperature permanent magnet application was determined by analyzing the dependence of temperature coefficients of the coercivity on the concentrations of various constituent elements.
Article
Chemistry, Multidisciplinary
Iordana Astefanoaei, Radel Gimaev, Vladimir Zverev, Alexander Tishin, Alexandru Stancu
Summary: This paper investigates the use of cubic/sphere-shaped magnetic nanoparticles (MNPs) for magnetic hyperthermia. Simulation results show that cubic-shaped MNPs have a larger spatial distribution of therapeutic temperature in tumor volume compared to spherical-shaped MNPs. The study also analyzes the MNP doses required to induce therapeutic temperature values within tissues.
Article
Metallurgy & Metallurgical Engineering
N. N. Liu, A. P. Pyatakov, M. N. Zharkov, N. A. Pyataev, J. V. Cherepanova, Y. Ichiyanagi, K. Nakazawa, T. Moriwaki, G. B. Sukhorukov, A. M. Tishin
Summary: The skin effect has significant restrictions on the frequency and parameters of the electromagnetic field in magnetic hyperthermia, requiring the determination of the optimal frequency range for effective treatment.
PHYSICS OF METALS AND METALLOGRAPHY
(2022)
Article
Mathematics, Interdisciplinary Applications
Manuel Richter, Seo-Jin Kim, Klaus Koepernik, Helge Rosner, Arnulf Mobius
Summary: This study compares the numerical accuracy and numerical precision of two electronic structure codes, Wien2k and FPLO, in calculating the total energy. The results show that the total energy data obtained from both codes agree within a difference of less than 10^-6. Wien2k achieves slightly higher accuracy at the cost of larger numerical effort, while FPLO shows higher precision, i.e., less numerical noise in the total energy derivatives, which is useful for evaluating physical properties.
Article
Materials Science, Multidisciplinary
Shiang Fang, Linda Ye, Madhav Prasad Ghimire, Mingu Kang, Junwei Liu, Minyong Han, Liang Fu, Manuel Richter, Jeroen van den Brink, Efthimios Kaxiras, Riccardo Comin, Joseph G. Checkelsky
Summary: In this study, we investigated the electronic structure of the ferromagnetic kagome metal Fe3Sn2 without spin-orbit coupling. We found two energetically split helical nodal lines near K and K' in the Brillouin zone, resulting from the trigonal stacking of the kagome layers. The hopping across A-A stacking introduced energy splitting, while that across A-B stacking controlled the momentum space amplitude of the helical nodal lines. Our findings have important implications for the design of topological materials.
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)
