Exotic structures on magnetic multilayers

TL;DR

This paper models magnetic multilayers to explore various magnetic structures, revealing transitions from periodic to quasiperiodic and chaotic states depending on anisotropy and depolarization effects.

Contribution

It introduces a new model for magnetic multilayers that predicts diverse magnetic structures and their transitions based on key material parameters.

Findings

Identification of regular periodic, quasiperiodic, and chaotic magnetic states.

Dependence of magnetic structures on anisotropy to exchange ratio.

Transition sequence from periodic to chaotic states with parameter changes.

Abstract

To characterize the possible magnetic structures created on magnetic multilayers a model has been formulated and studied. The interlayer inhomogeneous structures found indicate either (i) a regular periodic, (ii) a quasiperiodic change in the magnetization or (iii) spatially chaotic glass states. The magnetic structures created depend mainly on the ratio of the magnetic anisotropy constant to the exchange constant. With the increase of this ratio the periodic structures first transform into the quasiperiodic and then into the chaotic glass states. The same tendency arises with the depolarization of the magnetic moments of the first layer deposited on the substrate.