Electric Field-Induced Nonreciprocal Directional Dichroism in a Time-Reversal-Odd Antiferromagnet
© 2025 The Author(s). Advanced Materials published by Wiley‐VCH GmbH.
| Publié dans: | Advanced materials (Deerfield Beach, Fla.). - 1998. - 37(2025), 9 vom: 05. März, Seite e2414876 |
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| Auteur principal: | |
| Autres auteurs: | , |
| Format: | Article en ligne |
| Langue: | English |
| Publié: |
2025
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| Accès à la collection: | Advanced materials (Deerfield Beach, Fla.) |
| Sujets: | Journal Article altermagnet antiferromagnet domain nonreciprocal optical phenomena |
| Résumé: | © 2025 The Author(s). Advanced Materials published by Wiley‐VCH GmbH. Antiferromagnets with broken time-reversal ( T $\mathcal{T}$ ) symmetry ( T $\mathcal{T}$ -odd antiferromagnets) have gained extensive attention, mainly due to their ferromagnet-like behavior despite the absence of net magnetization. However, certain types of T $\mathcal{T}$ -odd antiferromagnets remain inaccessible by the typical ferromagnet-like phenomena (e.g., anomalous Hall effect). One such system is characterized by a T $\mathcal{T}$ -odd scalar quantity, the magnetic toroidal monopole. To access the broken T $\mathcal{T}$ symmetry in such a system, a unique nonreciprocal optical phenomenon, electric field-induced nonreciprocal directional dichroism (E-induced NDD), is employed. Signals of E-induced NDD are successfully detected in a T $\mathcal{T}$ -odd antiferromagnet, Co₂SiO₄, whose magnetic structure is characterized by the magnetic toroidal monopole. Furthermore, by spatially resolving the E-induced NDD, spatial distributions of a pair of domain states related to one another by the T $\mathcal{T}$ operation are visualized. The domain imaging revealed the inversion of the domain pattern by applying a magnetic field, which is explained by trilinear coupling attributed to the piezomagnetic effect. The observation of E-induced NDD highlights unique functionalities of T $\mathcal{T}$ -odd antiferromagnets |
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| Description: | Date Revised 07.03.2025 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
| ISSN: | 1521-4095 |
| DOI: | 10.1002/adma.202414876 |