Spin Seebeck effect in insulating epitaxial γ-Fe2O3 thin films

被引：23
|
作者：
Jimenez-Cavero, P. [1 ,2 ]
Lucas, I. [1 ,2 ,3 ]
Anadon, A. [1 ,2 ]
Ramos, R. [4 ]
Niizeki, T. [4 ]
Aguirre, M. H. [1 ,2 ,3 ,5 ]
Algarabel, P. A. [2 ,6 ,7 ]
Uchida, K. [8 ,9 ]
Ibarra, M. R. [1 ,2 ,3 ,5 ]
Saitoh, E. [4 ,5 ,10 ,11 ]
Morellon, L. [1 ,2 ,3 ]
机构：
[1] Univ Zaragoza, Inst Nanociencia Aragon, Zaragoza 50018, Spain
[2] Univ Zaragoza, Dept Fis Mat Condensada, E-50009 Zaragoza, Spain
[3] Fdn INA, Zaragoza 50018, Spain
[4] Tohoku Univ, WPI Adv Inst Mat Res, Sendai, Miyagi 9808577, Japan
[5] Univ Zaragoza, Lab Microscopias Avanzadas, Zaragoza 50018, Spain
[6] Univ Zaragoza, Inst Ciencia Mat Aragon, E-50009 Zaragoza, Spain
[7] CSIC, E-50009 Zaragoza, Spain
[8] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan
[9] Japan Sci & Technol Agcy, PRESTO, Saitama 3320012, Japan
[10] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan
[11] Japan Atom Energy Agcy, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan
来源：
APL MATERIALS | 2017年 / 5卷 / 02期
关键词：
OXIDE; MAGHEMITE; GROWTH;
D O I：
10.1063/1.4975618
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
We report the fabrication of high crystal quality epitaxial thin films of maghemite (gamma-Fe2O3), a classic ferrimagnetic insulating iron oxide. Spin Seebeck effect (SSE) measurements in gamma-Fe2O3/Pt bilayers as a function of sample preparation conditions and temperature yield a SSE coefficient of 0.5(1) mu V/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. (C) 2017 Author(s).
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页数：8
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