Dzyaloshinskii-Moriya bias theory for thin magnetic slabs

Abstract

Magnetic bias has been thoroughly explored during recent decades. The off-center shift of the hysteresis loop is usually achieved through exchange or dipolar interactions. However, the recently identified Dzyaloshinskii-Moriya Bias (DMB) offers an alternative to dipolar and exchange bias. A key advantage of DMB is its occurrence in a single uniform physical component, without the need for multiple layers and interfaces required by other mechanisms. It applies to thin in-plane magnetic slabs with bulk Dzyaloshinskii-Moriya interaction. An important advantage of these systems is that an external magnetic field can control the magnitude of the loop shift. Here, we present a general theoretical framework for the conditions to obtain DMB, which also clarifies the underlying principles of the effect. Our results suggest that this mechanism opens several possibilities in developing innovative applications.