Spin Seebeck effect in insulating epitaxial γ−Fe2O3 thin films | Zendy

Pilar Jiménez-Cavero | Zendy; I. Lucas | Zendy; Alberto Anadón | Zendy; R. Ramos | Zendy; Tomohiko Niizeki | Zendy; Myriam H. Aguirre | Zendy; P. A. Algarabel | Zendy; Kenichi Uchida | Zendy; M. R. Ibarra | Zendy; Eiji Saitoh | Zendy; L. Morellón | Zendy

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Spin Seebeck effect in insulating epitaxial γ−Fe2O3 thin films

Author(s) -

Pilar Jiménez-Cavero,

I. Lucas,

Alberto Anadón,

R. Ramos,

Tomohiko Niizeki,

Myriam H. Aguirre,

P. A. Algarabel,

Kenichi Uchida,

M. R. Ibarra,

Eiji Saitoh,

L. Morellón

Publication year - 2017

Publication title -

apl materials

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.571

H-Index - 60

ISSN - 2166-532X

DOI - 10.1063/1.4975618

Subject(s) - materials science , maghemite , ferrimagnetism , condensed matter physics , magnetite , thin film , seebeck coefficient , epitaxy , atmospheric temperature range , thermoelectric effect , oxide , magnetization , nanotechnology , magnetic field , metallurgy , layer (electronics) , composite material , thermal conductivity , physics , quantum mechanics , meteorology , thermodynamics

We report the fabrication of high crystal quality epitaxial thin films of maghemite (γ−Fe2O3), a classic ferrimagnetic insulating iron oxide. Spin Seebeck effect (SSE) measurements in γ−Fe2O3/Pt bilayers as a function of sample preparation conditions and temperature yield a SSE coefficient of 0.5(1) μV/K at room temperature. Dependence on temperature allows us to estimate the magnon diffusion length in maghemite to be in the range of tens of nanometers, in good agreement with that of conducting iron oxide magnetite (Fe3O4), establishing the relevance of spin currents of magnonic origin in magnetic iron oxides

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