Spin Resistivity in Frustrated Antiferromagnets

TL;DR

This study investigates how frustration in antiferromagnetic FCC films affects spin resistivity, revealing discontinuities at phase transitions and the influence of surface effects through Monte Carlo simulations.

Contribution

It introduces a detailed analysis of spin resistivity behavior in frustrated antiferromagnets, comparing Ising and Heisenberg models and highlighting frustration effects.

Findings

Resistivity shows discontinuities at phase transition points.

Surface effects significantly influence resistivity.

Frustration alters the resistivity behavior compared to non-frustrated systems.

Abstract

In this paper we study the spin transport in frustrated antiferromagnetic FCC films by Monte Carlo simulation. In the case of Ising spin model, we show that the spin resistivity versus temperature exhibits a discontinuity at the phase transition temperature: an upward jump or a downward fall, depending on how many parallel and antiparallel localized spins interacting with a given itinerant spin. The surface effects as well as the difference of two degenerate states on the resistivity are analyzed. Comparison with non frustrated antiferromagnets is shown to highlight the frustration effect. We also show and discuss the results of the Heisenberg spin model on the same lattice.