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

ABSTRACT: 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.

SUBMITTER: Hirohata A

PROVIDER: S-EPMC5792645 | biostudies-literature | 2018 Jan

REPOSITORIES: biostudies-literature

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

Hirohata Atsufumi A Baba Yuji Y Murphy Benedict A BA Ng Benny B Yao Yunqi Y Nagao Kazuki K Kim Jun-Young JY

Scientific reports 20180131 1

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 ...[more]

PMID: 29386664

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