Dynamic Critical Behavior in Models of Ferromagnetic Gadolinium

TL;DR

This paper employs a novel combination of Monte Carlo and molecular dynamics simulations to analyze the critical dynamics of ferromagnetic gadolinium, considering exchange interactions and relativistic effects, and evaluates the impact of dipole-dipole interactions.

Contribution

It introduces a new numerical approach combining Monte Carlo and molecular dynamics to study critical behavior in gadolinium, accounting for complex interactions and relativistic effects.

Findings

Calculated dynamic critical exponents using finite-size scaling.

Evaluated the influence of dipole-dipole interactions on critical behavior.

Provided explanations for gadolinium's anomalous dynamic critical behavior.

Abstract

A numerical technique combining Monte Carlo and molecular dynamics simulations is used for the first time to examine the complex critical dynamics of models of ferromagnetic gadolinium in which both strong exchange interactions and relativistic effects of several different types are taken into account. A finitesize scaling technique is used to calculate the corresponding dynamic critical exponents. The role played by isotropic dipole-dipole interaction in the critical behavior of gadolinium is evaluated. The results obtained provide an explanation for the anomalous dynamic critical behavior of gadolinium.