Magneto-optical detection of spin accumulation under the influence of mechanical rotation

Atsufumi Hirohata, Yuji Baba, Benedict Andrew Murphy, Benny Ng, Yunqi Yao, Kazuki Nagao, Jun-Young Kim

Research output: Contribution to journalArticlepeer-review


The generation of spin-polarised carriers in a non-magnetic material holds the key to realise highly efficient spintronic devices. Recently, it has been shown that the large spin-orbit coupling can generate spin-polarised currents in noble metals such as tungsten and platinum. Especially, if small samples of such metals are rotated on a plane disc in the presence of a perpendicular magnetic field, the orbital angular momentum is altered leading to a segregation of spin up and spin down electrons, i.e., a spin current in the samples. This is manifested via an induced magnetic moment on the metal. In this letter, magneto-optical Kerr effect (MOKE) is used to detect induced magnetic moments which allows remote measurements on metal samples rotating at 100 ~ 210 Hz. Our results confirm the mechanical generation of spin-polarised currents via optical detection of spin accumulation.
Original languageEnglish
Pages (from-to)1-8
Number of pages8
JournalScientific Reports
Publication statusPublished - 31 Jan 2018

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© The Authors, 2018.

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