Characteristic temperatures of exchange biased systems

TL;DR

This paper analyzes characteristic temperatures in exchange biased ferromagnetic-antiferromagnetic systems, highlighting the distinct nature of the inducing temperature $T_{ind}$ and its importance in understanding exchange interactions.

Contribution

It introduces and discusses the concept of the inducing temperature $T_{ind}$, differentiating it from the blocking and Nél temperatures, and explores methods to measure it.

Findings

$T_{ind}$ is generally different from $T_{B}$ and $T_{N}$.

Measuring $T_{ind}$ provides deeper insight into exchange interactions.

The paper discusses experimental approaches to determine $T_{ind}$.

Abstract

Characteristic temperatures in ferromagnetic - antiferromagnetic exchange biased systems are analyzed. In addition to usual blocking temperature of exchange bias $T_{B}$, and the N\'{e}el temperature of an antiferromagnet $T_{N}$, the inducing temperature $T_{ind}$, i.e., the temperature, at which the direction of exchange anisotropy is established, has been recently proposed. We demonstrate that this temperature is in general case different from $T_{B}$ and $T_{N}$. Physics and experimental approaches to measure the inducing temperature are discussed. Measurements of $T_{ind}$, in addition to $T_{B}$, and $T_{N}$, provide important information about exchange interactions in ferromagnetic - antiferromagnetic heterostructures.