The Reason of Sign-Variable Thermoelectric Effect in Fe86Mn13C Alloy

Abstract

The unique electrical and magnetic properties Fe86Mn13C alloy (Hadfild's steel) are due to special modulated structure. The alloy is widely used in mechanical engineering. Complex studies of the structure and properties of the alloy both in bulk samples and thin-films are suggested to describe the creation of a deformation martensite structure in Fe86Mn13C alloy in the form of self-assembled clusters. It is shown that combinations of anti-ferromagnetic austenite and ferrimagnetic martensite of deformation create unique electric and magnetic properties of Fe86Mn13C alloy both in bulk and in a thin-film state. We seek to explain the reason for the change of the sign of thermoelectric effect depending on temperature. Our task is to investigate thin Fe86Mn13C films as a possible solution to the problems of spintronics.

The Clusters Self-Assembled Crystal and Magnetic Structure During the Martensite Transition in Fe86mn13c Alloy

“…1 dark strings correspond to deformation martensite in initial austenite phase (light areas). Similar striped structure was observed on bulk samples in work [4] of the alloy in the period between the stripes was a few microns. Electron diffraction patterns Fig.…”

“…Modulated structure -antiferromagnetic austenite and ferromagnetic deformation martensite formed in conditions of plastic deformation of the alloy Fe 86 Mn 13 C. This particularity creates a unique electrical and magnetic properties of the alloy [4,5]. In this regard, thin films Fe 86 Mn 13 C, having a modulated structure, can be used as a spintronic material [6].…”

“…In the alloy Fe 86 Mn 13 C previously discovered the thermoelectric effect [4]. The thermoelectromotive force and magnetoresistance in Fe86Mn13C alloy reverses its sign in a certain range of temperatures.…”