Bulletin of the American Physical Society
APS March Meeting 2014
Volume 59, Number 1
Monday–Friday, March 3–7, 2014; Denver, Colorado
Session F40: Invited Session: New Magnetoresistance in Metal/Magnetic Insulator Heterostructures
8:00 AM–10:24 AM,
Tuesday, March 4, 2014
Room: Mile High Ballroom 2B-3B
Sponsoring Unit: GMAG
Chair: Sufeng Zhang, Arizona University
Abstract ID: BAPS.2014.MAR.F40.1
Abstract: F40.00001 : Theory of spin Hall magnetoresistance (SMR) and related phenomena*
8:00 AM–8:36 AM
Preview Abstract Abstract
(Tohoku University and TU Delft)
A new anisotropic magnetoresistance effect has recently been found for a Pt film on top of the insulating ferrimagnet Yttrium-Iron-Garnet (YIG) [1-6]. We interpret this effect by the simultaneous action of spin Hall and inverse spin Hall effects as a non-equilibrium proximity phenomenon dubbed spin Hall magnetoresistance (SMR). This mechanism does not require the equilibrium proximity magnetization in Pt, which was assumed in . We computed the SMR in F\textbar N and F\textbar N\textbar F layered systems, where F is a magnetic insulator, treating the normal metal N by spin-diffusion theory with quantum mechanical boundary conditions at the interfaces in terms of the spin-mixing conductance . Our results explain the experimentally observed spin Hall magnetoresistance in F\textbar N bilayers. An analysis of the Hall effect when magnetization is normal to the plane allowed the experimental observation of the imaginary part of the mixing conductance . For F\textbar N\textbar F spin valves we predict enhanced SMR amplitudes when magnetizations are collinear. In this talk I review the state of the art and discuss recent extensions of the SMR theory. \\[4pt]  H. Nakayama et al., Phys. Rev. Lett. 110, 206601 (2013).\\[0pt]  C. Hahn, Phys. Rev. B 87, 174417 (2013).\\[0pt]  M. Althammer et al., Phys. Rev. B 87, 224401 (2013).\\[0pt]  N. Vlietstra, et al., Appl. Phys. Lett. 103, 032401 (2013).\\[0pt]  Y. M. Lu et al., Phys. Rev. B 87, 220409 (2013).\\[0pt]  M. Isasa et al., arXiv:1307.1267\\[0pt]  Y. Chen et al., Phys. Rev. B 87, 144411 (2013).
*The reported research has been carried out in collaboration with M. Althammer, Y. Chen, T. Chiba, S. Goennenwein, H. Nakayama, E. Saitoh, S. Takahashi, B. van Wees, N. Vlietstra, and others.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2014.MAR.F40.1
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