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】

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