Magnetic phase transitions in ultrathin films of different crystal structures

TL;DR

This paper investigates magnetic phase transitions in ultrathin films with various crystal structures using the Ising model, revealing that the Curie temperature decreases with fewer layers and that critical exponents are lattice-independent.

Contribution

It introduces a theoretical analysis of ultrathin film magnetism, showing layer-dependent Curie temperature and lattice-independent critical exponents within the Ising model framework.

Findings

Curie temperature inversely proportional to the number of layers

Critical exponent ν is independent of lattice type

Theoretical framework applicable to different crystal structures

Abstract

The properties of ultrathin films have been studied within the framework of Ising model and the method of random-field interactions. It is shown that the Curie temperature is inversely proportional to the number of layers. Critical exponent $\nu$ has been obtained and it is shown that it does not depend on the type of crystalline lattice.