Article
Materials Science, Multidisciplinary
P. Dalmas de Reotier, A. Yaouanc
Summary: The polarization function P-Z(exp)(t) measured by the muon-spin relaxation (mu SR) technique for the SrCr8Ga4O19 and ZnCu3(OH)(6)Cl-2 spin-liquid systems reveals the temperature and energy dependent behavior of the magnetic correlations. Different spin-dynamics mechanisms are observed at different energy ranges.
Article
Chemistry, Inorganic & Nuclear
Qianhui Duan, Huanpeng Bu, Vladimir Pomjakushin, Hubertus Luetkens, Yuke Li, Jinkui Zhao, Jason S. Gardner, Hanjie Guo
Summary: This study reports the magnetic properties of orthorhombic Li3Co2SbO6. Multiple magnetic transitions were observed and distinct frequency-independent transitions were identified. Various measurements confirmed the presence of a long-range magnetic ordered state, although there were discrepancies between different measurement techniques.
INORGANIC CHEMISTRY
(2022)
Article
Physics, Applied
Hui Zhang, Zheng Feng, Guansong Li, Liang Zhang, Xiaobing Chen, He Bai, Song Sun, Jin Tang, Jine Zhang, Furong Han, Huaiwen Yang, Wei Tan, Yuansha Chen, Fengxia Hu, Jianwang Cai, Liang Guo, Sunmi Shin, Weisheng Zhao, Baogen Shen, Jirong Sun
Summary: Despite intensive research, the mechanism determining the terahertz (THz) emission of ferromagnetic (FM) metallic monolayers remains elusive. In this study, we found solid evidence that the THz emission is dominated by the anomalous Nernst effect (ANE), which is induced by an ultrafast electron temperature gradient, resulting in THz emission. The introduction of a SiO2 buffer layer led to a reversal in the polarity of the THz waveform, further confirming the importance of ANE.
APPLIED PHYSICS REVIEWS
(2023)
Article
Physics, Multidisciplinary
Zhuoran He, Aiyun Luo, Biao Lian, Gang Xu
Summary: The study combines density functional theory and the Schwinger boson method to simultaneously determine the topological electronic band structure and topological magnon spectrum in the ferromagnetic phase of CoCu3(OH)(6)Cl-2. It is found that the hopping parameters of the electronic and magnonic bands can mutually influence each other, predicting the possibility of magnetically driven topological phase transitions in the electronic bands. The study provides a useful method to deal with correlated topological magnetic systems with narrow band gaps self-consistently.
NEW JOURNAL OF PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Meng Huang, Shanshan Wang, Zhaohao Wang, Ping Liu, Junxiang Xiang, Chao Feng, Xiangqi Wang, Zengming Zhang, Zhenchao Wen, Hongjun Xu, Guoqiang Yu, Yalin Lu, Weisheng Zhao, Shengyuan A. Yang, Dazhi Hou, Bin Xiang
Summary: The study reveals a colossal anomalous Hall conductivity in a 1T-CrTe2 flake, dominated by the extrinsic skew scattering process rather than the intrinsic Berry phase effect. This phenomenon defies the dilemma faced by most ferromagnets, achieving both a large anomalous Hall angle and high electric conductivity simultaneously.
Article
Crystallography
Sueli H. Masunaga, Vagner B. Barbeta, Fabio Abud, Milton S. Torikachvili, Renato F. Jardim
Summary: Rare-earth tetraborides RB4 with geometric magnetic frustration and unusual magnetic properties are attracting great interest. In GdB4, the Gd3+ spins align along the ab plane, while in the isomorphic ErB4, the Er3+ spins are confined to the c-axis. Solid solutions of (Gd, Er)B-4 provide a good platform to explore the intricate magnetic behavior in these compounds. Single crystals of Gd1-xErxB4 (x = 0, 0.2, and 0.4) were grown in aluminum flux, showing single-phase materials and a drop in unit cell volume with increasing Er content. Heat capacity measurements revealed a systematic decrease of the Neel temperature (T-N) with increasing Er content.
Article
Physics, Applied
C. Guarcello, F. S. Bergeret, R. Citro
Summary: This study investigates the switching current distributions of ferromagnetic anomalous Josephson junctions under a linearly increasing bias current and uncovers a significant correlation between the position of the switching current distributions and crucial system parameters such as the strength of the spin-orbit coupling and the Gilbert damping parameter. By conducting a comprehensive analysis of the interplay among noise, magnetization, phase dynamics, and the statistical properties of the switching current distribution, a deeper understanding of these intriguing cryogenic spintronics devices is achieved.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Physical
Yushuo Xu, Shuhua Wang, Shiqiang Yu, Xinxin Wang, Baibiao Huang, Ying Dai, Wei Wei
Summary: This research identifies hexagonal lattice of ferromagnetic Fe(OH)(2) monolayer as an appealing candidate for valleytronics, with a large spontaneous valley polarization. Experimental results show that the strong spin-orbit coupling and robust ferromagnetic exchange interaction in Fe(OH)(2) result in a spontaneous valley polarization as large as 67 meV, indicative of room-temperature application.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Materials Science, Multidisciplinary
S. Raut, S. Chakravarty, H. S. Mohanty, S. Mahapatra, S. Bhardwaj, A. M. Awasthi, B. Kar, K. Singh, M. Chandra, A. Lakhani, V. Ganesan, M. Mishra Patidar, R. K. Sharma, Velaga Srihari, H. K. Poswal, S. Mukherjee, S. Giri, S. Panigrahi
Summary: The specific-heat and exchange bias effects were investigated in polycrystalline Sm0.5Y0.5Fe0.58Mn0.42O3. The specific-heat measurements showed a linear contribution at low temperature and a diffused Schottky peak. The inhomogeneity of the molecular field in the spinglass state explained the observed distribution of Schottky levels. A finite zero field exchange bias effect was observed at low temperatures, which could be attributed to the competition of interfacial exchange bias and atomic exchange bias.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Shuo Li, Thomas Frauenheim, Junjie He
Summary: It is theoretically feasible to detect and manipulate the valley degree of freedom in two-dimensional hexagonal lattices with both inversion asymmetry and time-reversal symmetry. Surface functionalization can induce intrinsic ferrovalley polarization in MXenes, and the presence of spin-orbital coupling ensures their time-reversal symmetry. Through chemical engineering of functionalization, the structure-property relationship in 2D layers can be tuned to achieve desirable spin-valley coupling. This theoretical insight provides a new opportunity for valleytronics and spintronics.
Article
Materials Science, Multidisciplinary
Hanuma Kumar Dara, P. D. Babu, G. Markandeyulu
Summary: The intermetallic MnFe0.25Sb exhibits A-type antiferromagnetic behavior with magnetic frustration at low temperatures, indicating the near-degeneracy of different magnetic states. The exchange interactions between Mn and Fe atoms are found to be antiferromagnetic, leading to magnetic frustration.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Article
Engineering, Electrical & Electronic
M. A. Najdi, J. M. AL-Mukh, H. A. Jassem
Summary: The study found that the values of intradot Coulomb correlation energy and spin-spin exchange interaction have a significant impact on the heat current in the system. These results provide insights for designing high-efficiency heat diodes.
JOURNAL OF COMPUTATIONAL ELECTRONICS
(2021)
Article
Materials Science, Multidisciplinary
Maoxiang Fu, Qiang Cao, Jiahui Liu, Kun Zhang, Guolei Liu, Shishou Kang, Yanxue Chen, Shishen Yan, Lihui Bai, Liangmo Mei, Zhen-Dong Sun
Summary: An unconventional carrier-dependent anomalous Hall effect is reported in ferromagnetic semiconductor (ZnCo)O films, exhibiting a quadratic scaling relation. The separation of the effect from the nonlinear ordinary Hall effect is shown to be necessary for proper scaling. Interestingly, a quadratic scaling relation between anomalous Hall conductivity and longitudinal conductivity is obtained.
RESULTS IN PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Yu Liu, Hengxin Tan, Zhixiang Hu, Binghai Yan, C. Petrovic
Summary: In this study, electronic transport, thermal, and thermodynamic properties in FeCr2Te4 single crystals were comprehensively investigated. The anomalous Hall effect (AHE) in FeCr2Te4 is most likely dominated by an extrinsic skew-scattering mechanism rather than an intrinsic KL or an extrinsic side-jump mechanism, supported by linear scaling between anomalous Hall resistivity and longitudinal resistivity. This behavior is observed below a weak-itinerant paramagnetic-to-ferrimagnetic transition temperature Tc around 123K.
Article
Geosciences, Multidisciplinary
Zack Guido, Teddy Allen, Simon Mason, Pablo Mendez-Lazaro
Summary: This study investigates the relationship between anomalous heat and tropical cyclones in the eastern Caribbean, finding distinct warm areas regardless of storm intensity and suggesting the presence of high temperature anomalies for several days, even in locations not directly affected by the storms.
GEOPHYSICAL RESEARCH LETTERS
(2022)