arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1505.08006cond-mat.mtrl-sci
收藏

使用贝叶斯统计确定薄膜YIG的热导率

Thermal conductance of thin film YIG determined using Bayesian statistics

C. Euler, P. Hołuj, T. Langner, A. Kehlberger, V. I. Vasyuchka, M. Kläui, G. Jakob

摘要:

薄膜钇铁石榴石(YPDMATHABMM Fe $_5$ O $_{12}$)是研究热生纯自旋电流和自旋塞贝克效应的典型材料。3 Ω法是一种已建立的测量薄膜跨平面热导率的技术,但不能以其标准形式用于YIG/GGG(Ga $_3$ Gd $_5$ O $_{12}$)系统。我们使用二维热传输建模,并介绍了一种基于贝叶斯统计的技术,以评估从3 Ω方法的测量数据。我们的分析方法使我们能够研究传统使用的3-omega分析无法访问的材料系统。薄膜YIG的热导率随温度变化的数据对于自旋热电子学领域的实验具有重要意义。在这里,我们显示的数据之间的室温和10 K的薄膜覆盖了很宽的厚度范围,以及磁场效应的热导率在10 K和50 K之间。

英文摘要:

Thin film YIG (Y$_3$Fe$_5$O$_{12}$) 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 can not be used in YIG/GGG (Ga$_3$Gd$_5$O$_{12}$) 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 materials 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 K and 50 K.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑