Generation of megahertz-band spin currents using nonlinear spin pumping

Abstract Spin pumping enables the generation of d.c. and gigahertz-band (GHz-band) voltages from an applied microwave via magnetization dynamics when combined with inverse spin Hall effects. However, generating such voltages in the in-between frequency region, or the megahertz (MHz) band, has been d...

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Autores principales:	Shingo Watanabe, Daichi Hirobe, Yuki Shiomi, Ryo Iguchi, Shunsuke Daimon, Mai Kameda, Saburo Takahashi, Eiji Saitoh
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/740be8b4fbac48c8b5583fbf1553b1ac
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id	oai:doaj.org-article:740be8b4fbac48c8b5583fbf1553b1ac
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spelling	oai:doaj.org-article:740be8b4fbac48c8b5583fbf1553b1ac2021-12-02T11:52:29ZGeneration of megahertz-band spin currents using nonlinear spin pumping10.1038/s41598-017-04901-42045-2322https://doaj.org/article/740be8b4fbac48c8b5583fbf1553b1ac2017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-04901-4https://doaj.org/toc/2045-2322Abstract Spin pumping enables the generation of d.c. and gigahertz-band (GHz-band) voltages from an applied microwave via magnetization dynamics when combined with inverse spin Hall effects. However, generating such voltages in the in-between frequency region, or the megahertz (MHz) band, has been difficult since ferromagnetic resonance usually occurs in the GHz band. Here we show that in spite of GHz-band microwaves applied, MHz-band voltages can be generated by spin pumping with use of nonlinear magnetization dynamics in Y3Fe5O12. The mechanism is ascribed to the MHz-band oscillation of the amplitude of the magnetization precession, which is projected onto a rectified voltage component via spin pumping. The present finding could be useful for frequency down-conversion thanks to the simple and durable structure, continuous-wave operation, and the tunability of an output frequency with low magnetic fields.Shingo WatanabeDaichi HirobeYuki ShiomiRyo IguchiShunsuke DaimonMai KamedaSaburo TakahashiEiji SaitohNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-6 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Shingo Watanabe Daichi Hirobe Yuki Shiomi Ryo Iguchi Shunsuke Daimon Mai Kameda Saburo Takahashi Eiji Saitoh Generation of megahertz-band spin currents using nonlinear spin pumping
description	Abstract Spin pumping enables the generation of d.c. and gigahertz-band (GHz-band) voltages from an applied microwave via magnetization dynamics when combined with inverse spin Hall effects. However, generating such voltages in the in-between frequency region, or the megahertz (MHz) band, has been difficult since ferromagnetic resonance usually occurs in the GHz band. Here we show that in spite of GHz-band microwaves applied, MHz-band voltages can be generated by spin pumping with use of nonlinear magnetization dynamics in Y3Fe5O12. The mechanism is ascribed to the MHz-band oscillation of the amplitude of the magnetization precession, which is projected onto a rectified voltage component via spin pumping. The present finding could be useful for frequency down-conversion thanks to the simple and durable structure, continuous-wave operation, and the tunability of an output frequency with low magnetic fields.
format	article
author	Shingo Watanabe Daichi Hirobe Yuki Shiomi Ryo Iguchi Shunsuke Daimon Mai Kameda Saburo Takahashi Eiji Saitoh
author_facet	Shingo Watanabe Daichi Hirobe Yuki Shiomi Ryo Iguchi Shunsuke Daimon Mai Kameda Saburo Takahashi Eiji Saitoh
author_sort	Shingo Watanabe
title	Generation of megahertz-band spin currents using nonlinear spin pumping
title_short	Generation of megahertz-band spin currents using nonlinear spin pumping
title_full	Generation of megahertz-band spin currents using nonlinear spin pumping
title_fullStr	Generation of megahertz-band spin currents using nonlinear spin pumping
title_full_unstemmed	Generation of megahertz-band spin currents using nonlinear spin pumping
title_sort	generation of megahertz-band spin currents using nonlinear spin pumping
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/740be8b4fbac48c8b5583fbf1553b1ac
work_keys_str_mv	AT shingowatanabe generationofmegahertzbandspincurrentsusingnonlinearspinpumping AT daichihirobe generationofmegahertzbandspincurrentsusingnonlinearspinpumping AT yukishiomi generationofmegahertzbandspincurrentsusingnonlinearspinpumping AT ryoiguchi generationofmegahertzbandspincurrentsusingnonlinearspinpumping AT shunsukedaimon generationofmegahertzbandspincurrentsusingnonlinearspinpumping AT maikameda generationofmegahertzbandspincurrentsusingnonlinearspinpumping AT saburotakahashi generationofmegahertzbandspincurrentsusingnonlinearspinpumping AT eijisaitoh generationofmegahertzbandspincurrentsusingnonlinearspinpumping
_version_	1718395052855656448

Generation of megahertz-band spin currents using nonlinear spin pumping

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