APS March Meeting 2013
Volume 58, Number 1
Monday–Friday, March 18–22, 2013;
Baltimore, Maryland
Session A1: Invited Session: Spin Caloritronics
8:00 AM–11:00 AM,
Monday, March 18, 2013
Room: Ballroom I
Sponsoring
Units:
DCMP GMAG
Chair: Kai Liu, University of California, Davis
Abstract ID: BAPS.2013.MAR.A1.1
Abstract: A1.00001 : Longitudinal Spin Seebeck Effect
8:00 AM–8:36 AM
Preview Abstract
Abstract
Author:
Eiji Saitoh
(Institute for Materials Research, Tohoku University)
The spin Seebeck effect (SSE) refers to the generation of a spin voltage as
a result of a temperature gradient in magnetic materials [1-7]. Here, a spin
voltage is a potential for electron spins to drive a nonequilibrium spin
current; when a conductor is attached to a magnet with a finite spin
voltage, it induces a spin injection into the conductor. The SSE is of
crucial importance in spintronics and spin caloritronics, since it enables
simple and versatile generation of a spin current from heat.
The simplest and most straightforward setup of the SSE is the longitudinal
configuration [4], in which a spin current flowing parallel to a temperature
gradient is measured via the inverse spin Hall effect (ISHE). The
longitudinal SSE device consists of a ferromagnetic or ferrimagnetic
insulator (FI, e.g. YIG) covered with a paramagnetic metal (PM, e.g. Pt)
film. When a temperature gradient is applied perpendicular to the FI/PM
interface, an ISHE-induced voltage is generated in the PM layer.
In this talk, we report the observation of the longitudinal SSE in various
FI/PM systems and provide evidence that the longitudinal SSE is free from
thermoelectric artefact [7], i.e., the anomalous Nernst effect caused by
extrinsic magnetic proximity [8]. Then, we discuss the longitudinal SSE from
an application point of view [6].
We thank E. Saitoh, S. Maekawa, G. E. W. Bauer, X.-F. Jin, H. Adachi, D.
Hou, D. Tian, T. Kikkawa, A. Kirihara, and M. Ishida for their support and
valuable discussions.
\\[4pt]
[1] K. Uchida et al., Nature 455, 778 (2008).\\[0pt]
[2] K. Uchida et al., Nature Mater. 9, 894 (2010).\\[0pt]
[3] C. M. Jaworski et al., Nature Mater. 9, 898 (2010).\\[0pt]
[4] K. Uchida et al., Appl. Phys. Lett. 97, 172505 (2010).\\[0pt]
[5] K. Uchida et al., Nature Mater. 10, 737 (2011).\\[0pt]
[6] A. Kirihara et al., Nature Mater. 11, 686 (2012).\\[0pt]
[7] T. Kikkawa et al., arXiv:1211.0139 (2012). \\[0pt]
[8] S. Y. Huang et al., Phys. Rev. Lett. 109, 107204 (2012).
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2013.MAR.A1.1