Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1103/PhysRevLett.131.089702 | DOI Listing |
Phys Rev Lett
August 2023
Physics Department, University of Arkansas, Fayetteville, Arkansas 72701, USA.
Phys Rev Lett
November 2021
Physics Department, University of Arkansas, Fayetteville, Arkansas 72701, USA.
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.
View Article and Find Full Text PDFPhys Rev Lett
August 2020
Physics Department, University of Arkansas, Fayetteville, Arkansas 72701, USA.
First-principles methods are employed to understand the existence of magnetic-domain-wall-induced electric polarization observed in rare-earth iron garnets. In contrast with previous beliefs, it is found that the occurrence of such polarization neither requires the local magnetic moments of the rare-earth ions nor noncollinear magnetism. It can rather be understood as originating from a magnetoelectric effect arising from ferromagnetic interactions between octahedral and tetrahedral Fe ions at the domain walls, and the mechanism behind is found to be a symmetric exchange-striction mechanism.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!