6533b823fe1ef96bd127e3de
RESEARCH PRODUCT
Reconstruction of an effective magnon mean free path distribution from spin Seebeck measurements in thin films
Gerhard JakobR. A. ZarateEr-jia GuoEr-jia GuoS. FuentesMathias KläuiEmigdio Chavez-angelsubject
Condensed Matter - Materials ScienceMaterials scienceCondensed matter physicsPhononMean free pathMagnonYttrium iron garnetGeneral Physics and AstronomyMaterials Science (cond-mat.mtrl-sci)FOS: Physical sciencesReconstruction algorithmContext (language use)02 engineering and technologyElectron021001 nanoscience & nanotechnology01 natural scienceschemistry.chemical_compoundCondensed Matter::Materials Sciencechemistry0103 physical sciencesCondensed Matter::Strongly Correlated Electrons010306 general physics0210 nano-technologySpin-½description
A thorough understanding of the mean-free-path (MFP) distribution of the energy carriers is crucial to engineer and tune the transport properties of materials. In this context, a significant body of work has investigated the phonon and electron MFP distribution, however, similar studies of the magnon MFP distribution have not been carried out so far. In this work, we used thickness-dependence measurements of the longitudinal spin Seebeck (LSSE) effect of yttrium iron garnet films to reconstruct the cumulative distribution of a SSE related effective magnon MFP. By using the experimental data reported by Guo et al. [Phys. Rev. X 6, 031012 (2016)], we adapted the phonon MFP reconstruction algorithm proposed by A.J. Minnich, [Phys. Rev. Lett. 109, 205901 (2012)] and apply it to magnons. The reconstruction showed that magnons with different MFP contribute in different manner to the total LSSE and the effective magnon MFP distribution spreads far beyond their typical averaged values.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-01-12 |