Large magneto-optical Kerr effect and imaging of magnetic octupole domains in an antiferromagnetic metal
作者： Ryotaro Arita , Tomoya Higo , C. L. Chien , Satoru Nakatsuji , Liang Wu
DOI: 10.1038/S41566-017-0086-Z
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摘要: The magneto-optical Kerr effect (MOKE) has been intensively studied in a variety of ferro-and ferrimagnetic materials as a powerful probe for electronic and magnetic properties–and for magneto-optical technologies. The MOKE can be additionally useful for the investigation of the antiferromagnetic (AF) state, although thus far limited to insulators–. Here, we report the first observation of the MOKE in an AF metal. In particular, we find that the non-collinear AF metal Mn3Sn (ref.) exhibits a large zero-field Kerr rotation angle of 20 mdeg at room …
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