Strong temperature-dependent thermoelectric power of IrMn3 thin films of different thicknesses

Author:

Hu JunfengORCID,Kothari Mukund Krishna,Eimer Sylvain,Zhao WeishengORCID,Yu Haiming,Ansermet Jean-Philippe

Abstract

Abstract IrMn3 thin films were experimentally characterized by thermoelectric power and resistivity as a function of temperature and sample thickness. The Seebeck coefficient shows strong temperature dependence and the value increases with temperature up to 350 K. An empirical Boltzmann sigmoid function can fit our data remarkably well. The temperature-dependent resistivity shows a similar behavior as the thermoelectric power, i.e. both these two properties exhibit a transitional behavior at some critical temperature range, which is further confirmed by the magnetic susceptibility measurements.

Funder

Program of Introducing Talents of Discipline to Universities in China ‘‘111 Program”

the National Key Research and Development Program of China

National Natural Science Foundation of China

Publisher

IOP Publishing

Subject

Surfaces, Coatings and Films,Acoustics and Ultrasonics,Condensed Matter Physics,Electronic, Optical and Magnetic Materials

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