We present an experimental and theoretical study of the low-field dynamics of current-driven vortex oscillations in nanocontacts based on spin-valve multilayers. These oscillations appear as low-frequency (250-500 MHz) excitations in the electrical power spectrum which arise from to variations in the giant-magnetoresistance. We show that the vortex oscillations, once nucleated at large fields applied perpendicular to the film plane, persist at zero applied magnetic fields. Some training effects on the oscillation frequency and linewidth also observed for small in-plane magnetic fields.
Linking Thermal History to Shear Band Interaction and Macroscopic Ductility in Metallic Glasses
Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences（中国科学院宁波材料技术与工程研究所）；Institute of Advanced Magnetic Materials, College of Materials & Environmental Engineering, Hangzhou Dianzi University（杭州电子科技大学材料与环境工程学院先进磁性材料研究所）；State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences（中国科学院力学研究所非线性力学国家重点实验室）；School of Engineering Science, University of Chinese Academy of Sciences（中国科学院大学工程科学学院）；Beijing Computational Science Research Center（北京计算科学研究中心）
Interlocked Vortex Order in the Frustrated $A_3$V$_9$Te$_{13}$ Lattice ($A$=Cs,Rb)
New Cornerstone Science Laboratory, Center for Correlated Matter, Zhejiang University（新Cornerstone科学实验室，关联物质中心，浙江大学）；School of Physics, Zhejiang University（物理学院，浙江大学）；Institute for Advanced Study in Physics, Zhejiang University（物理学高等研究院，浙江大学）
Field-tunable toroidal moment and anomalous Hall effect in noncollinear antiferromagnetic Weyl semimetal Co1/3TaS2
将磁性与能带拓扑结构相结合，提供了各种新颖的相位，这在其他方面是不可能的。其中，非共线金属反铁磁体因其不同的磁基态而具有丰富的拓扑物理性质。然而，由于缺乏合适的材料，特别是三角晶格反铁磁体，只有很少的实验研究。在这里，我们报告，金属三角形反铁磁体Co 1/3 TaS 2表现出大量的异常霍尔效应（AHE）有关的非共线磁序。我们的第一性原理计算发现，沙漏外尔费米子从非对称对称触发AHE。我们进一步表明，AHE在Co 1/3 TaS 2的特点是由环向力矩，一个涡旋状的多极分量，产生的手征晶格和几何挫折的组合。最后，不寻常的磁场可调性的环矩把Co 1/3 TaS 2作为一个罕见的例子，非共线金属反铁磁体充满有趣的磁性和拓扑性质。
Single-$q$ Cycloid and Double-$q$ Vortex Lattices in Layered Magnetic Semimetal EuAg$_4$Sb$_2$
Massachusetts Institute of Technology（麻省理工学院）；California Institute of Technology（加州理工学院）；Institut Laue Langevin（朗之万研究所）；European Spallation Source ERIC（欧洲散裂源）；Oak Ridge National Laboratory（橡树岭国家实验室）；National High Magnetic Field Laboratory, LANL（洛斯阿拉莫斯国家实验室高磁场实验室）；Hokkaido University（北海道大学）；PSI Center for Neutron and Muon Sciences（瑞士保罗谢勒研究所中子与μ子科学中心）
