We show how compensated antiferromagnetic spins can be implemented in the micromagnetic simulation program MuMax3. We demonstrate that we can model spin flop coupling as a uniaxial anisotropy for small canting angles and how we can take into account the exact energy terms for strong coupling between a ferromagnet and compensated antiferromagnet. We also investigate the training effect in biaxial antiferromagnets and reproduce the training effect in a polycrystalline IrMn/CoFe bilayer.
Sub-spin-flop switching of a fully compensated antiferromagnet by magnetic field
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences(中国科学院物理研究所凝聚态物理国家实验室);School of Physical Sciences, University of Chinese Academy of Sciences(中国科学院大学物理科学学院);International Center for Quantum Materials, School of Physics, Peking University(北京大学物理学院量子材料科学中心)
Modelling spin waves in noncollinear antiferromagnets: spin-flop states, spin spirals, skyrmions and antiskyrmions
反铁磁材料中的自旋波在下一代磁振子技术中具有巨大的潜力。然而,它们的性质及其对基态反铁磁结构类型的依赖性仍然是一个悬而未决的问题。在这里,我们研究理论上的自旋波在一维和二维模型系统的重点是非共线反铁磁纹理,如自旋螺旋和相反的拓扑电荷skyrmions。我们特别解决了最近在体反铁磁体$α$ -$\text{Cu}_2\text{V}_2\text{O}_7$中利用非弹性中子散射实验测量的非互易自旋激发[Phys.\修订版本\ Lett. \textbf{119},047201(2017)],其中我们帮助表征检测到的自旋波模式的性质。此外,我们讨论了Dzyaloshinskiii-Moriya相互作用如何提高反铁磁物质中自旋波模式的简并度,类似于电子Rashba分裂。本文研究了反铁磁自旋螺旋系统和Skyrmion系统中的自旋波激发,讨论了它们的非弹性散射谱特征。我们证明了在某些反铁磁体中,可以用各向同性的Dzyaloshinskiii-Moriya相互作用获得反克尔米离子。
Interaction of magnons with plasmons in a system of antiferromagnetic insulators coupled to a superconductor microwave cavity through the interfacial exchange interaction
Thermal Science Research Center, Shandong Institute of Advanced Technology(山东先进技术研究院热科学研究中心);Faculty of Applied Sciences, Macao Polytechnic University(澳门理工学院应用科学学院)
University of Regensburg(雷根斯堡大学);Technische Universität München(慕尼黑工业大学);Helmholtz-Zentrum Dresden-Rossendorf(德累斯顿-罗斯多夫亥姆霍兹中心);Donostia International Physics Center(圣塞巴斯蒂安国际物理中心);University of the Basque Country, UPV/EHU(巴斯克大学);Czech Academy of Sciences(捷克科学院);Universidad de Tarapacá(塔拉帕卡大学);Johannes Gutenberg-University Mainz(美因茨约翰内斯·古腾堡大学);Hitachi Cambridge Laboratory(日立剑桥实验室)
Antiferromagnetic pseudospintronics without spin splitting
Nankai University(南开大学);Beijing University of Chemical Technology(北京化工大学);Beijing Computational Science Research Center(北京计算科学研究中心);Zhejiang University(浙江大学)
Angle-Dependent Magnetoresistance Induced by Interface-Generated Spin Current in RuO$_2$/Permalloy Heterostructures
Institute of Physics, Johannes Gutenberg-University Mainz(美因茨约翰内斯·古腾堡大学物理研究所);Department of Physics, Indiana University(印第安纳大学物理系);Center for Spinelectronic Materials and Devices, Department of Physics, Bielefeld University(比勒费尔德大学自旋电子材料与器件中心);Department of Physics, Center for Quantum Spintronics, Norwegian University of Science and Technology(挪威科技大学量子自旋电子学中心物理系)