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Sci Adv. 2017 Apr 7;3(4):e1601614. doi: 10.1126/sciadv.1601614. eCollection 2017 Apr.

Role of damping in spin Seebeck effect in yttrium iron garnet thin films.

Author information

1
Department of Physics, Colorado State University, Fort Collins, CO 80523, USA.
2
Engineering Research Center for Extreme Ultraviolet Science and Technology and Department of Electrical and Computer Engineering, Colorado State University, Fort Collins, CO 80523, USA.

Abstract

The role of damping in the spin Seebeck effect (SSE) was studied experimentally for the first time. The experiments used Y3Fe5O12 (YIG)/Pt bilayered structures where the YIG films exhibit very similar structural and static magnetic properties but very different damping. The data show that a decrease in the damping gives rise to an increase in the SSE coefficient, which is qualitatively consistent with some of the theoretical models. This response also shows quasi-linear behavior, which was not predicted explicitly by previous studies. The data also indicate that the SSE coefficient shows no notable correlations with the enhanced damping due to spin pumping, which can be understood in the frame of two existing models.

KEYWORDS:

Spin Hall effect; Spintronics; ferromagnetic resonance; magnetic thin films; spin Seebeck effect

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