Thermal gradient driven enhancement of pure spin current at room temperature in nonlocal spin transport devices

被引：5

作者：

Bakaul, S. R. ^{[1
,3
]}

Hu, S. ^{[1
]}

Kimura, T. ^{[1
,2
]}

机构：

[1] Kyushu Univ, Adv Elect Res Div, INAMORI Frontier Res Ctr, Fukuoka 8190395, Japan

[2] Japan Sci & Technol Agcy, CREST, Tokyo 1020075, Japan

[3] Japan Soc Promot Sci, Tokyo 1020083, Japan

来源：

PHYSICAL REVIEW B | 2013年 / 88卷 / 18期

基金：

日本学术振兴会;

关键词：

INJECTION; SPINTRONICS; ELECTRONICS; CHARGE;

D O I：

10.1103/PhysRevB.88.184407

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We show that the junction design in the laterally configured ferromagnetic/nonmagnetic (FM/NM) hybrid structure significantly affects the spin transport under high-bias current. The thermal conductivity mismatch between FM and NM and the inhomogeneous current distribution at the interface produce a reversed temperature gradient, which drastically reduces the thermal spin injection efficiency. The homogeneity in the temperature gradient at the interface is a crucial factor in determining the efficiency of the thermal spin current generation. The experimental results show excellent agreement with the theoretical model [Y. Takezoe et al., Phys. Rev. B 82, 094451 (2010)] that the spin relaxation is proportional to the second spatial derivative of the temperature.

引用

页数：4

共 24 条

[1] Interplay of Peltier and Seebeck Effects in Nanoscale Nonlocal Spin Valves [J].

Bakker, F. L. ;

Slachter, A. ;

Adam, J-P ;

van Wees, B. J. .

PHYSICAL REVIEW LETTERS, 2010, 105 (13)

[2]

Bauer GEW, 2012, NAT MATER, V11, P391, DOI [10.1038/nmat3301, 10.1038/NMAT3301]

[3] Control of spin injection by direct current in lateral spin valves [J].

Casanova, Felix ;

Sharoni, Amos ;

Erekhinsky, Mikhail ;

Schuller, Ivan K. .

PHYSICAL REVIEW B, 2009, 79 (18)

[4]

Cengel Y.A., 2003, Heat Transfer: A Practical Approach

[5] The emergence of spin electronics in data storage [J].

Chappert, Claude ;

Fert, Albert ;

Van Dau, Frederic Nguyen .

NATURE MATERIALS, 2007, 6 (11) :813-823

[6] Spin-dependent Seebeck effect in non-local spin valve devices [J].

Erekhinsky, Mikhail ;

Casanova, Felix ;

Schuller, Ivan K. ;

Sharoni, Amos .

APPLIED PHYSICS LETTERS, 2012, 100 (21)

[7]

Flipse J, 2012, NAT NANOTECHNOL, V7, P166, DOI [10.1038/nnano.2012.2, 10.1038/NNANO.2012.2]

[8] Anomalous Nernst-Ettingshausen effect in nonlocal spin valve measurement under high-bias current injection [J].

Hu, Shaojie ;

Kimura, Takashi .

PHYSICAL REVIEW B, 2013, 87 (01)

[9] Intrinsic Spin-Dependent Thermal Transport [J].

Huang, S. Y. ;

Wang, W. G. ;

Lee, S. F. ;

Kwo, J. ;

Chien, C. L. .

PHYSICAL REVIEW LETTERS, 2011, 107 (21)

[10]

Jansen R, 2012, NAT MATER, V11, P400, DOI [10.1038/NMAT3293, 10.1038/nmat3293]

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