Magnetization Compensation Temperature and Frustration-Induced Topological Defects in Ferrimagnetic Antiperovskite <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>Mn</mml:mi></mml:mrow><mml:mrow><mml:mn>4</mml:mn></mml:mrow></mml:msub><mml:mi mathvariant="normal">N</mml:mi></mml:mrow></mml:math>
Temuujin Bayaraa, Changsong Xu, L. Bellaiche
Abstract
First-principles-based simulations are conducted to investigate magnetic properties and topological spin textures in the antiperovskite Mn_{4}N ferrimagnet. A magnetization compensation temperature, resulting from a competition between different Mn sublattices, is found in this system, when under thermal equilibrium. Striking metastable topological states are also discovered, including nanometric hedgehog-antihedgehog pairs that originate from frustrated exchange interactions rather than the usual Dzyaloshinskii-Moriya interaction.
Topics & Concepts
AntiperovskiteFerrimagnetismCondensed matter physicsMetastabilityMagnetizationMaterials scienceFerromagnetismTopology (electrical circuits)ThermalSpin (aerodynamics)Compensation (psychology)Spontaneous magnetizationMagnetic domainHysteresisMagnetic structureMagnetic fieldTopological insulatorBistabilityAntiferromagnetismThermal conductionQuantum tunnellingThermal Expansion and Ionic ConductivityMagnetic and transport properties of perovskites and related materialsHeusler alloys: electronic and magnetic properties