Ground and Applied-Field-Driven Magnetic States of Antiferromagnets

TL;DR

This paper introduces a mean-field mathematical framework to analyze and predict various magnetic states in antiferromagnets under applied magnetic fields, revealing phase transitions and equilibrium conditions.

Contribution

It develops a novel mean-field method to systematically calculate and map the ground states and phase transitions of antiferromagnets influenced by magnetic fields.

Findings

Predicted magnetic state transitions including spin-flop and spin-flip.

Mapped all equilibrium magnetic ground states and phase conditions.

Demonstrated the framework's effectiveness in understanding magnetic state origins.

Abstract

As discussed in this chapter, we develop a mean-field mathematical method to calculate the ground states of antiferromagnets and better understand the applied magnetic-field induced exotic properties. Within antiferromagnetic materials competitive and cooperative interactions exist leading to substance extraordinary magnetic states. Our calculations predict that applying a magnetic field to antiferromagnets can switch it from one magnetic state to another. These include antiferromagnetic ground state, spin-flop transition, spin-flopped state, spin-flip transition and spin-flipped state. Our framework successfully demonstrates these phase changes. With this, a map of all equilibrium magnetic ground states, as well as the respective equilibrium phase conditions, are derived. Our study provides insight into the origins of the various magnetic states.