Journal
PHYSICAL REVIEW B
Volume 97, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.97.020408
Keywords
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Funding
- Center for Emergent Materials, an NSF MRSEC [DMR-1420451]
- Army Research Office (ARO) MURI Grant [W911NF-14-1-0016]
- U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences [DE-SC0001304]
- European Research Council
- D-ITP consortium, a program of the Netherlands Organization for Scientific Research (NWO) - Dutch Ministry of Education, Culture and Science (OCW)
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Temperature-dependent spin Seebeck effect data on Pt| yttrium iron garnet (YIG) (Y3Fe5O12)| gallium gadolinium garnet (Gd3Ga5O12) are reported for YIG films of various thicknesses. The effect is reported as a spin Seebeck resistivity (SSR), the inverse spin-Hall field divided by the heat flux, to circumvent uncertainties about temperature gradients inside the films. The SSR is a nonmonotonic function of YIG thickness. A diffusive model for magnon transport demonstrates how these data give evidence for the existence of two distinct length scales in thermal spin transport, a spin-diffusion length, and a magnon energy relaxation length.
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