Domain walls and the conductivity of mesoscopic ferromagnets

TL;DR

This paper explores how magnetic domain walls and geometric phases influence quantum interference effects like weak localization and conductance fluctuations in mesoscopic ferromagnets, proposing experiments to observe these phenomena.

Contribution

It introduces the role of geometric phases from domain walls in quantum interference effects and suggests experimental setups to detect conductance oscillations.

Findings

Analysis of quantum interference effects in ferromagnets

Proposal of experiments for conductance oscillations

Discussion of geometric phase effects

Abstract

Quantum interference phenomena in the conductivity of mesoscopic ferromagnets are considered, particularly with regard to the effects of geometric phases acquired by electrons propagating through regions of spatially varying magnetization (due, e.g., to magnetic domain walls). Weak localization and electron-electron interaction quantum corrections to the conductivity and universal conductance fluctuations are discussed. Experiments are proposed for multiply-connected geometries that should reveal conductance oscillations with variations of the profile of the magnetization.