Theory of terahertz-driven magnetic switching in rare-earth orthoferrites: The case of TmFeO3

IF 3.7 2区物理与天体物理 Q1 Physics and Astronomy

Physical Review B Pub Date : 2025-02-07 DOI:10.1103/physrevb.111.064411

N. R. Vovk, E. V. Ezerskaya, R. V. Mikhaylovskiy

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引用次数: 0

Abstract

We report a theoretical formalism that describes a dynamic magnetic response of rare-earth orthoferrites, particularly those with non-Kramers rare-earth () ions, when driven by strong terahertz fields. We derive a total thermodynamic potential for the exchange coupled -Fe system by constructing an effective Hamiltonian and employing a mean-field theory approximation. We investigate static properties of the and Fe subsystems across the spin-reorientation phase transitions and obtain resonance frequencies for Fe and magnetic sublattices as a function of temperature. Taking an example of the archetypical orthoferrite TmFeO3, we perform numerical modeling to accurately describe the behavior of its anisotropy functions vs temperature. Finally, we analyze switching dynamics of Fe spins and nonlinear effects in the subsystem of TmFeO3 driven by strong terahertz radiation.

Published by the American Physical Society

2025

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来源期刊

Physical Review B 物理-物理：凝聚态物理

CiteScore

6.70

自引率

32.40%

发文量

审稿时长

3.0 months

期刊介绍： Physical Review B (PRB) is the world’s largest dedicated physics journal, publishing approximately 100 new, high-quality papers each week. The most highly cited journal in condensed matter physics, PRB provides outstanding depth and breadth of coverage, combined with unrivaled context and background for ongoing research by scientists worldwide. PRB covers the full range of condensed matter, materials physics, and related subfields, including: -Structure and phase transitions -Ferroelectrics and multiferroics -Disordered systems and alloys -Magnetism -Superconductivity -Electronic structure, photonics, and metamaterials -Semiconductors and mesoscopic systems -Surfaces, nanoscience, and two-dimensional materials -Topological states of matter