Lock-in thermography measurements of the spin Peltier effect in a compensated ferrimagnet and its comparison to the spin Seebeck effect. (20th April 2018)

• Record Type: Journal Article
• Authors: Yagmur, A; Iguchi, R; Geprägs, S; Erb, A; Daimon, S; Saitoh, E; Gross, R; Uchida, K
• Is Part Of: Journal of physics. Volume 51:Number 19(2018)
• Publication Date: 2018-04-20
• Subjects: spin caloritronics -- spin current -- spin Peltier effect -- spin Seebeck effect; Physics -- Periodicals; 530
• DOI: 10.1088/1361-6463/aabc75
• Languages: English
• ISSNs: 0022-3727

Abstract

Abstract: The spin Peltier effect (SPE) in a junction comprising a gadolinium-iron-garnet (GdIG) slab and a Pt film has been investigated around the magnetization compensation temperature of GdIG by means of the lock-in thermography method. When a charge current is applied to the Pt layer, a spin current is generated across the Pt/GdIG interface via the spin Hall effect in Pt. This spin current induces a heat current and a measurable temperature change near the Pt/GdIG interface due to the SPE. The SPE signal in the Pt/GdIG junction shows a sign change around the magnetization compensation temperature, demonstrating the similar temperature dependence of the SPE and the spin Seebeck effect for the Pt/GdIG hybrid system.