Temperature derivative of the resistance of spin valves

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:322

Article; Proceedings Paper

Granville, Simon¹  Yu, Haiming^1,2  Dubois, Julie^1,3  Gravier, Laurent¹  Ansermet, Jean-Philippe¹ 

[1] Ecole Polytech Fed Lausanne, Inst Phys Nanostrutures, Stn 3, CH-1015 Lausanne, Switzerland

[2] Peking Univ, Sch Phys, State Key Lab Mesoscop Phys, Beijing 100871, Peoples R China

[3] Ecole Mines, F-75006 Paris, France

关键词: Spin torque;    Nanostructure;    Spin valves;    Magnetoresistance;   

DOI  :  10.1016/j.jmmm.2009.03.027

来源: Elsevier

【 摘 要 】

Spin-dependent transport properties of nanowires containing individual Co/Cu/Co pseudo-spin valves were investigated by monitoring an AC voltage induced by a temperature oscillation under a continuous DC current. We observed sharp peaks in the field-dependent AC voltage response. These peaks only appear close to the magnetic field range where conventional magnetoresistance shows a reversible and gradual transition. The effect is interpreted as an extra dissipation process with a distinct temperature dependence that occurs in non-collinear magnetic configurations when transverse moment relaxation takes place. (C) 2009 Elsevier B.V. All rights reserved.

【 授权许可】

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