Thickness dependence of spin Peltier effect visualized by thermal imaging technique
Shunsuke Daimon, Ken-ichi Uchida, Naomi Ujiie, Yasuyuki Hattori, Rei Tsuboi, Eiji Saitoh
Abstract
Magnon propagation length in a ferrimagnetic insulator yttrium iron garnet (YIG) has been investigated by measuring and analyzing the YIG-thickness t_YIG dependence of the spin Peltier effect (SPE) in a Pt/YIG junction system. By means of the lock-in thermography technique, we measured the spatial distribution of the SPE-induced temperature modulation in the Pt/YIG system with the t_YIG gradation, allowing us to obtain the accurate t_YIG dependence of SPE with high t_YIG resolution. Based on the t_YIG dependence of SPE, we verified the applicability of several phenomenological models to estimate the magnon diffusion length in YIG.
Topics & Concepts
FerrimagnetismYttrium iron garnetMaterials scienceThermoelectric effectCondensed matter physicsMagnonThermographyYttriumInsulator (electricity)ThermalDiffusionPhenomenological modelTemperature measurementSpin (aerodynamics)Modulation (music)Spin diffusionNuclear magnetic resonanceImaging techniqueMagneto-Optical Properties and ApplicationsTransition Metal Oxide NanomaterialsOptical Polarization and Ellipsometry