Role of domain wall fluctuations in non-Fermi liquid behavior of metamagnets

TL;DR

This paper investigates how domain wall fluctuations influence the non-Fermi liquid behavior in three-dimensional metamagnets near phase transitions, revealing a temperature regime with quasi-linear resistivity due to domain wall scattering.

Contribution

It demonstrates that in weak pinning conditions, domain wall fluctuations dominate electron scattering, leading to non-Fermi liquid resistivity behavior near the metamagnet transition.

Findings

Domain wall fluctuations cause quasi-linear resistivity at low temperatures.

Spin relaxation time of domain walls exceeds that of volume spins.

Resistivity behavior is governed by electron scattering off domain wall fluctuations.

Abstract

We study resistivity temperature dependence of a three dimensional metamagnet near the metamagnet phase transition point in the case when magnetic structure tends to split into regions with high and low magnetization. We show that in the case of weak pinning the spin relaxation time of domain wall is much larger than that of the volume spin fluctuations. This opens a temperature range where resistivity temperature dependence is determined by scattering of conducting electrons by the domain wall fluctuations. We show that it leads to quasi-linear low temperature dependence of resistivity.