Spinmotive force due to motion of magnetic bubble arrays driven by magnetic field gradient

TL;DR

This paper theoretically demonstrates how magnetic bubble arrays subjected to a magnetic field gradient can generate electric voltages via spinmotive force, offering insights into magnetic dynamics and potential spintronic applications.

Contribution

It introduces a theoretical model for spinmotive force in magnetic bubble arrays driven by magnetic field gradients, linking voltage generation to non-adiabaticity parameters.

Findings

Electric voltages are generated in magnetic bubble arrays under field gradients.

The system provides a direct measure of non-adiabaticity in magnetization dynamics.

Potential for developing new spintronic devices exploiting field-gradient-induced voltages.

Abstract

Interaction between local magnetization and conduction electrons is responsible for a variety of phenomena in magnetic materials. It has been recently shown that spin current and associated electric voltage can be induced by magnetization that depends on both time and space. This effect, called spinmotive force, provides for a powerful tool for exploring the dynamics and the nature of magnetic textures, as well as a new source for electromotive force. Here we theoretically demonstrate the generation of electric voltages in magnetic bubble array systems subjected to a magnetic field gradient. It is shown by deriving expressions for the electric voltages that the present system offers a direct measure of phenomenological parameter that describes non-adiabaticity in the current induced magnetization dynamics. This spinmotive force opens a door for new types of spintronic devices that exploit the field-gradient.