Theoretical Exploration on the Magnetic Properties of Ferromagnetic Metallic Glass: An Ising Model on Random Recursive Lattice

TL;DR

This paper presents a theoretical model using an Ising model on a recursive lattice to explore the magnetic properties of Fe-based metallic glass, revealing lower Curie temperature and weaker magnetization compared to crystalline ferromagnets.

Contribution

It introduces an exact recursive lattice model for amorphous ferromagnetic metals, capturing the effects of structural randomness on magnetic properties.

Findings

Glassy metallic magnets have lower Curie temperatures.

They exhibit weaker magnetization.

They have higher entropy than crystalline ferromagnets.

Abstract

The ferromagnetic Ising spins are modeled on a recursive lattice constructed from random-angled rhombus units with stochastic configurations, to study the magnetic properties of the bulk Fe-based metallic glass. The integration of spins on the structural glass model well represents the magnetic moments in the glassy metal. The model is exactly solved by the recursive calculation technique. The magnetization of the amorphous Ising spins, i.e. the glassy metallic magnet is investigated by our modeling and calculation on a theoretical base. The results show that the glassy metallic magnets has a lower Curie temperature, weaker magnetization, and higher entropy comparing to the regular ferromagnet in crystal form. These findings can be understood with the randomness of the amorphous system, and agrees well with others' experimental observations.