Effects of non-adiabaticity on the voltage generated by a moving domain wall

TL;DR

This paper investigates how non-adiabatic effects influence the voltage generated by a moving domain wall, considering different transport regimes and spin relaxation, especially below the Walker breakdown threshold.

Contribution

It introduces a comprehensive analysis of non-adiabatic corrections to the voltage in domain wall motion, incorporating both diffusive and ballistic regimes.

Findings

Non-adiabatic corrections significantly affect the generated voltage.

Spin relaxation contributes notably to the voltage.

Results apply to fields below the Walker breakdown limit.

Abstract

We determine the voltage generated by a field-driven domain wall, taking into account non-adiabatic corrections to the motive force induced by the time-dependent spin Berry phase. Both the diffusive and ballistic transport regimes are considered. We find that that the non-adiabatic corrections, together with the contributions due to spin relaxation, determine the voltage for driving fields smaller than the Walker breakdown limit.