Effective suppression of thermoelectric voltage in nonlocal spin-valve measurement. (18th May 2017)

• Record Type: Journal Article
• Authors: Ariki, Taisei; Nomura, Tatsuya; Ohnishi, Kohei; Kimura, Takashi
• Is Part Of: Applied physics express. Volume 10:Number 6(2017)
• Publication Date: 2017-05-18
• Subjects: Physics -- Periodicals; Technology -- Periodicals; 621.05
• DOI: 10.7567/APEX.10.063004
• Languages: English
• ISSNs: 1882-0778

Abstract

Abstract: We demonstrate that the background signal in the nonlocal spin-valve measurement can be sufficiently suppressed by optimizing the electrode design of the lateral spin valve. A relatively long length scale of heat propagation produces spin-independent thermoelectric signals under the combination of the Peltier and Seebeck effects. These unfavorable signals can be reduced by mixing the Peltier effects in two transparent ferromagnetic/nonmagnetic junctions. Proper understanding of the contribution from the heat current in no spin-current area is a key for effective reduction of the spin-independent background signal.