Micromagnetic study of equilibrium states in nano hemispheroidal shells

TL;DR

This study uses micromagnetic simulations to explore equilibrium magnetic states in nano hemispheroidal shells, identifying four distinct phases and analyzing vortex configurations based on size and shape.

Contribution

It provides a detailed micromagnetic analysis of how geometry influences magnetic phases in nano hemispheroidal shells, including vortex behavior.

Findings

Four magnetic phases identified: easy axis, easy plane, onion, vortex.

Vortex magnetization profiles analyzed and limitations discussed.

Energy density varies with shell dimensions and magnetic configuration.

Abstract

We present results of micromagnetic simulations of thin ferromagnetic nano hemispheroidal shells with sizes ranging from 1 to 50 nm (inside dimensions). Depending on the geometrical and magnetic parameters of the hemispheroidal shell, there exist four different magnetic phases: easy axis, easy plane, onion and vortex. The profile for the vortex magnetization distribution is analyzed and the limitations and applicability of different vortex ansatzes are discussed. In addition, we investigate the total energy density for each of the magnetic distributions as a function of the hemispheroidal shell dimensions.