RT Journal Article
T1 Quantification of the interfacial and bulk contributions to the longitudinal spin Seebeck effect
A1 Jiménez Cavero, Pilar
A1 Lucas, Irene
A1 Bugallo Ferrón, David
A1 López Bueno, Carlos
A1 Ramos Amigo, Rafael Enrique
A1 Algarabel, Pedro Antonio
A1 Ibarra, Manuel Ricardo
A1 Rivadulla Fernández, José Francisco
A1 Morellón, Luis
AB We report the disentanglement of bulk and interfacial contributions to the thermally excited magnon spin current in the spin Seebeck effectunder static heating. For this purpose, we have studied the dependence of the inverse spin Hall voltage and the thermal conductivity on themagnetic layer thickness. Knowledge of these quantities allows us to take into account the influence of both sources of thermal spin currentin the analysis of the voltage dependence. The magnetic layer thickness modulates the relative magnitude of the involved thermal drops for afixed total thermal difference throughout the sample. In the end, we attain the separate contributions of both sources of thermal spincurrent—bulk and interfacial—and obtain the value of the thermal magnon accumulation length scale in maghemite, which we find to be29(1) nm. According to our results, bulk magnon accumulation dominates the spin Seebeck effect in our studied range of thicknesses, butthe interfacial component is by no means negligible
PB AIP Publishing
SN 0003-6951
YR 2021
FD 2021
LK http://hdl.handle.net/10347/24752
UL http://hdl.handle.net/10347/24752
LA eng
NO Appl. Phys. Lett. 118, 092404 (2021); https://doi.org/10.1063/5.0038192
NO This article appeared in P. Jiménez-Cavero et al. Applied Physics Letters 118, 092404 (2021) and may be found at https://aip.scitation.org/doi/10.1063/5.0038192
NO This work was supported by the Spanish Ministry of Science [through Project Nos. MAT2014-51982-C2-R, MAT2016-80762-R, MAT2017-82970-C2-R, and PID2019-104150RB-I00 (including FEDER funding) and the Aragón Regional government (Project No. E26)]. P.J.-C. acknowledges Spanish MECD for support through FPU program (Reference No. FPU014/02546). D.B. acknowledges support from MINECO (Spain) through an FPI program (No. BES-2017-079688). R.R. also acknowledges support from the European Commission through the Project No. 734187-SPICOLOST (H2020-MSCA-RISE-2016), the European Union's Horizon 2020 research and innovation program through the Marie Sklodowska-Curie Actions Grant Agreement SPEC No. 894006, and the Spanish Ministry of Science (No. RYC 2019-026915-I). Authors acknowledge the Advanced Microscopy Laboratory-INA University of Zaragoza for offering access to their instruments. C. L-B. acknowledges Xunta de Galicia and ESF for a PhD Grant (ED481A-2018/013)
DS Minerva
RD 27 abr 2026