Néel vector waves in antiferromagnetic CuMnAs excited by surface acoustic waves

IF 3.1 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Physical Review Materials Pub Date : 2024-08-13 DOI:10.1103/physrevmaterials.8.084406

M. Waqas Khaliq, Oliver J. Amin, Alberto Hernández-Mínguez, Marc Rovirola, Blai Casals, Khalid Omari, Sandra Ruiz-Gómez, Simone Finizio, Richard P. Campion, Kevin W. Edmonds, Vít Novák, Anna Mandziak, Lucia Aballe, Miguel Angel Niño, Joan Manel Hernàndez, Peter Wadley, Ferran Macià, Michael Foerster

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引用次数: 0

Abstract

Magnetoelastic effects in antiferromagnetic CuMnAs are investigated by applying dynamic strain in the 0.01% range through surface acoustic waves in the GaAs substrate. The magnetic state of the CuMnAs/GaAs is characterized by a multitude of submicron-sized domains, which we image by x-ray magnetic linear dichroism combined with photoemission electron microscopy. Within the explored strain range, CuMnAs shows magnetoelastic effects in the form of Néel vector waves with micrometer wavelength, which corresponds to an averaged overall spin-axis rotation up to

2 . 4^{\circ}

driven by the time-dependent strain from the surface acoustic wave. Measurements at different temperatures indicate a reduction of the wave amplitude when lowering the temperature. However, no domain wall motion has been detected on the nanosecond timescale.

Abstract Image

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表面声波激发的反铁磁性铜锰酸盐中的奈尔矢量波

通过在砷化镓衬底上施加 0.01% 范围内的表面声波动态应变，研究了反铁磁性铜锰砷化物中的磁弹性效应。CuMnAs/GaAs 的磁性状态以大量亚微米大小的磁畴为特征，我们通过 X 射线磁线性二色性结合光发射电子显微镜对这些磁畴进行了成像。在所探究的应变范围内，CuMnAs 显示出波长为微米的奈尔矢量波形式的磁弹性效应，这相当于在表面声波随时间变化的应变驱动下，平均整体自旋轴旋转达 2.4∘。在不同温度下进行的测量表明，当温度降低时，波幅会减小。然而，在纳秒时间尺度上没有检测到域壁运动。

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来源期刊

Physical Review Materials Physics and Astronomy-Physics and Astronomy (miscellaneous)

CiteScore

5.80

自引率

5.90%

发文量

611

期刊介绍： Physical Review Materials is a new broad-scope international journal for the multidisciplinary community engaged in research on materials. It is intended to fill a gap in the family of existing Physical Review journals that publish materials research. This field has grown rapidly in recent years and is increasingly being carried out in a way that transcends conventional subject boundaries. The journal was created to provide a common publication and reference source to the expanding community of physicists, materials scientists, chemists, engineers, and researchers in related disciplines that carry out high-quality original research in materials. It will share the same commitment to the high quality expected of all APS publications.