Two dimensional frustrated magnets in high magnetic field

TL;DR

This paper explores two-dimensional frustrated magnets in high magnetic fields through simulations and analysis, revealing enhanced magnetocaloric effects, magnetization plateaus, and complex phase transitions.

Contribution

It provides new insights into the behavior of 2D frustrated magnets under high magnetic fields using classical Monte Carlo simulations and spin wave analysis.

Findings

Enhanced magnetocaloric effect near ferromagnetic boundary

Route to an $m=1/3$ magnetization plateau on a square lattice

Cascade of phase transitions in AgNiO$_2$ model

Abstract

Frustrated magnets in high magnetic field have a long history of offering beautiful surprises to the patient investigator. Here we present the results of extensive classical Monte Carlo simulations of a variety of models of two dimensional magnets in magnetic field, together with complementary spin wave analysis. Striking results include (i) a massively enhanced magnetocaloric effect in antiferromagnets bordering on ferromagnetic order, (ii) a route to an $m=1/3$ magnetization plateau on a square lattice, and (iii) a cascade of phase transitions in a simple model of AgNiO$_2$.