Thickness dependence of anomalous Nernst coefficient and longitudinal spin Seebeck effect in ferromagnetic NixFe100−x films

Abstract Spin Seebeck effect (SSE) measured for metallic ferromagnetic thin films in commonly used longitudinal configuration contains the contribution from anomalous Nernst effect (ANE). The ANE is considered to arise from the bulk of the ferromagnet (FM) and the proximity-induced FM boundary layer...

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Autores principales:	Harsha Kannan, Xin Fan, Halise Celik, Xiufeng Han, John Q. Xiao
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/3afa79bdfb4348b2bd69c0a5fb82669c
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spelling	oai:doaj.org-article:3afa79bdfb4348b2bd69c0a5fb82669c2021-12-02T16:07:48ZThickness dependence of anomalous Nernst coefficient and longitudinal spin Seebeck effect in ferromagnetic NixFe100−x films10.1038/s41598-017-05946-12045-2322https://doaj.org/article/3afa79bdfb4348b2bd69c0a5fb82669c2017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-05946-1https://doaj.org/toc/2045-2322Abstract Spin Seebeck effect (SSE) measured for metallic ferromagnetic thin films in commonly used longitudinal configuration contains the contribution from anomalous Nernst effect (ANE). The ANE is considered to arise from the bulk of the ferromagnet (FM) and the proximity-induced FM boundary layer. We fabricate a FM alloy with zero Nernst coefficient to mitigate the ANE contamination of SSE and insert a thin layer of Cu to separate the heavy metal (HM) from the FM to avoid the proximity contribution. These modifications to the experiment should permit complete isolation of SSE from ANE in the longitudinal configuration. However, further thickness dependence studies and careful analysis of the results revealed, ANE contribution of the isolated FM alloy is twofold, surface and bulk. Both surface and bulk contributions, whose magnitudes are comparable to that of the SSE, can be modified by the neighboring layer. Hence surface contribution to the ANE in FM metals is an important effect that needs to be considered.Harsha KannanXin FanHalise CelikXiufeng HanJohn Q. XiaoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-7 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Harsha Kannan Xin Fan Halise Celik Xiufeng Han John Q. Xiao Thickness dependence of anomalous Nernst coefficient and longitudinal spin Seebeck effect in ferromagnetic NixFe100−x films
description	Abstract Spin Seebeck effect (SSE) measured for metallic ferromagnetic thin films in commonly used longitudinal configuration contains the contribution from anomalous Nernst effect (ANE). The ANE is considered to arise from the bulk of the ferromagnet (FM) and the proximity-induced FM boundary layer. We fabricate a FM alloy with zero Nernst coefficient to mitigate the ANE contamination of SSE and insert a thin layer of Cu to separate the heavy metal (HM) from the FM to avoid the proximity contribution. These modifications to the experiment should permit complete isolation of SSE from ANE in the longitudinal configuration. However, further thickness dependence studies and careful analysis of the results revealed, ANE contribution of the isolated FM alloy is twofold, surface and bulk. Both surface and bulk contributions, whose magnitudes are comparable to that of the SSE, can be modified by the neighboring layer. Hence surface contribution to the ANE in FM metals is an important effect that needs to be considered.
format	article
author	Harsha Kannan Xin Fan Halise Celik Xiufeng Han John Q. Xiao
author_facet	Harsha Kannan Xin Fan Halise Celik Xiufeng Han John Q. Xiao
author_sort	Harsha Kannan
title	Thickness dependence of anomalous Nernst coefficient and longitudinal spin Seebeck effect in ferromagnetic NixFe100−x films
title_short	Thickness dependence of anomalous Nernst coefficient and longitudinal spin Seebeck effect in ferromagnetic NixFe100−x films
title_full	Thickness dependence of anomalous Nernst coefficient and longitudinal spin Seebeck effect in ferromagnetic NixFe100−x films
title_fullStr	Thickness dependence of anomalous Nernst coefficient and longitudinal spin Seebeck effect in ferromagnetic NixFe100−x films
title_full_unstemmed	Thickness dependence of anomalous Nernst coefficient and longitudinal spin Seebeck effect in ferromagnetic NixFe100−x films
title_sort	thickness dependence of anomalous nernst coefficient and longitudinal spin seebeck effect in ferromagnetic nixfe100−x films
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/3afa79bdfb4348b2bd69c0a5fb82669c
work_keys_str_mv	AT harshakannan thicknessdependenceofanomalousnernstcoefficientandlongitudinalspinseebeckeffectinferromagneticnixfe100xfilms AT xinfan thicknessdependenceofanomalousnernstcoefficientandlongitudinalspinseebeckeffectinferromagneticnixfe100xfilms AT halisecelik thicknessdependenceofanomalousnernstcoefficientandlongitudinalspinseebeckeffectinferromagneticnixfe100xfilms AT xiufenghan thicknessdependenceofanomalousnernstcoefficientandlongitudinalspinseebeckeffectinferromagneticnixfe100xfilms AT johnqxiao thicknessdependenceofanomalousnernstcoefficientandlongitudinalspinseebeckeffectinferromagneticnixfe100xfilms
_version_	1718384709769101312

Thickness dependence of anomalous Nernst coefficient and longitudinal spin Seebeck effect in ferromagnetic NixFe100−x films

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