Exchange Bias Driven by Dzyaloshinskii-Moriya Interactions

Yanes, R. and Jackson, J. and Udvardi, László and Szunyogh, László and Nowak, U. (2013) Exchange Bias Driven by Dzyaloshinskii-Moriya Interactions. PHYSICAL REVIEW LETTERS, 111 (21). ISSN 0031-9007

Preview

Text 1305.2308v1.pdf Available under License Creative Commons Attribution. Download (468kB) | Preview

Abstract

The exchange bias effect in compensated IrMn3/Co(111) system is studied using multiscale modelling from ab-initio to atomistic calculations. We evaluate numerically the out-of-plane hysteresis loops of the bilayer for different thicknesses of the ferromagnet layer. The results show the existence of a perpendicular exchange bias field and an enhancement of the coercivity of the system. In order to elucidate the possible origin of the exchange bias, we analyse the hysteresis loops of a selected bilayer by tuning the different contributions to the exchange interaction across the interface. Our results indicate that the exchange bias is primarily induced by Dzyaloshinskii-Moriya interactions, while the coercivity is increased mainly due to a spin-flop mechanism.

Actions (login required)

Edit Item