Thermal conductance of thin film YIG determined using Bayesian statistics | |
Article | |
关键词: SPIN CALORITRONICS; 3-OMEGA METHOD; CONDUCTIVITY; GARNETS; METALS; | |
DOI : 10.1103/PhysRevB.92.094406 | |
来源: SCIE |
【 摘 要 】
Thin film YIG (Y3Fe5O12) is a prototypical material for experiments on thermally generated pure spin currents and the spin Seebeck effect. The 3 omega method is an established technique to measure the cross-plane thermal conductance of thin films, but cannot be used in YIG/GGG (Ga3Gd5O12) systems in its standard form. We use two-dimensional modeling of heat transport and introduce a technique based on Bayesian statistics to evaluate measurement data taken from the 3 omega method. Our analysis method allows us to study material systems that have not been accessible with the conventionally used 3 omega analysis. Temperature-dependent thermal conductance data of thin film YIG are of major importance for experiments in the field of spin caloritronics. Here we show data between room temperature and 10 K for films covering a wide thickness range as well as the magnetic field effect on the thermal conductance between 10 and 50 K.
【 授权许可】
Free