Thermal spin wave noise as a probe for the Dzyaloshinkii-Moriya interaction
Aurore Finco, Pawan Kumar, Van Tuong Pham, Joseba Urrestarazu-Larrañaga, Rodrigo Guedas Garcia, Maxime Rollo, Olivier Boulle, Joo-Von Kim, Vincent Jacques
备注：
6 pages, 4 figures, supplemental material available as ancillary file
Interfacial Dzyaloshinkii-Moriya interaction (DMI) is a key ingredient in the stabilization of chiral magnetic states in thin films. Its sign and strength often determine crucial properties of magnetic objects, like their topology or how they can be manipulated with currents. A few experimental techniques are currently available to measure DMI quantitatively, based on the study of domain walls, spin waves, or spin-orbit torques. In this work, we propose a qualitative variant of spin wave methods. We rely on magnetic noise from confined thermal spin waves in domain walls and skyrmions in perpendicularly magnetized thin films, which we probe with scanning NV center relaxometry. We show both numerically and experimentally that the sign of the DMI can be inferred from the amplitude of the detected noise, which is affected by the non-reciprocity in the spin wave dispersion. Furthermore, we also demonstrate that the noise distribution around the contour of magnetic skyrmions reveals their Néel/Bloch nature, giving therefore also insight into the strength of DMI involved in their stabilization.
Topological Magnetic Phases and Magnon-Phonon Hybridization in the Presence of Strong Dzyaloshinskii-Moriya Interaction
School of Physics and Astronomy, Shanghai Jiao Tong University（上海交通大学物理与天文学院）；Wilczek Quantum Center, School of Physics and Astronomy, Shanghai Jiao Tong University（上海交大物理与天文学院李政道量子中心）；Shanghai Research Center for Quantum Sciences（上海量子科学研究中心）；Department of Physics, The Chinese University of Hong Kong（香港中文大学物理系）；Institute for Quantum Science and Technology, Shanghai University（上海大学量子科学与技术研究院）；Department of Physics, Shanghai University（上海大学物理系）
Anisotropies and magnetic phase transitions in insulating antiferromagnets determined by a Spin-Hall magnetoresistance probe
我们证明，我们可以确定的反铁磁各向异性和体Dzyaloshinskiii-Moriya领域的绝缘氧化铁赤铁矿，α-Fe 2 O 3，使用表面敏感的自旋霍尔磁阻（SMR）技术。我们开发了一个分析模型，结合SMR测量，允许在很宽的温度和磁场值范围内的这种原型反铁磁体的材料参数的识别。使用具有不同取向的器件，我们证明了SMR响应强烈依赖于相对于磁晶各向异性轴的充电电流的方向。我们表明，我们可以提取的各向异性在很宽的温度范围内，包括整个桑色素相变。我们观察到，电响应是由反铁磁Néel序参量的取向，而不是由新兴的弱磁矩。我们的研究结果强调，表面灵敏度的SMR允许访问的反铁磁晶体的磁各向异性，特别是薄膜，在其他方法来确定各向异性，如体积敏感的磁化率测量不提供足够的灵敏度。
Anisotropic domain wall velocity profiles in the creep regime: the interplay of chiral damping, stiffness and Dzyaloshinskii-Moriya interaction
Istituto Nazionale di Ricerca Metrologica（意大利国家计量研究所）；Universitè Grenoble Alpes, CNRS, Institut Néel（格勒诺布尔阿尔卑斯大学，法国国家科学研究中心，内耳研究所）；Department of Physics, Freie Universität Berlin（柏林自由大学物理系）；Nuclear Radiation Detectors Research and Development Center, Bolu Abant Izzet Baysal University（博卢阿邦特伊泽特·巴伊萨尔大学核辐射探测器研发中心）；Istituto Officina dei Materiali del CNR (CNR-IOM), Sede Secondaria di Perugia, c/o Dipartimento di Fisica e Geologia, Università di Perugia（意大利国家研究委员会材料研究所（CNR-IOM），佩鲁吉亚分所，位于佩鲁贾大学物理与地质学系）；Dipartimento di Fisica e Geologia, Università di Perugia（佩鲁贾大学物理与地质学系）；School of Physics and Astronomy, University of Leeds（利兹大学物理与天文学院）；Empa（瑞士联邦材料与测试研究所）
Emergent Chaos-Like Dynamics of Spin-Orbit Torque-Driven Magnetic Transitions
Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy（马克斯·玻恩非线性光学和超短脉冲光谱研究所）；University of Augsburg（奥格斯堡大学）；Helmholtz-Zentrum Berlin für Materialien und Energie（柏林赫尔姆霍兹材料能源中心）；Ferdinand-Braun-Institut (FBH)（费迪南德·布劳恩研究所）；Technische Universität Berlin（柏林工业大学）；Deutsches Elektronen-Synchrotron（德国电子同步辐射中心）
