Published May 20, 2025 | Version v2
Dataset Open

Ferrimagnetism induced by thermal vibrations in oxygen-deficient manganite heterostructures

  • 1. Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, Freiestrasse 3, 3012 Bern, Switzerland
  • 2. Department of Chemistry and Physics of Materials, University of Salzburg, Jakob-Haringer-Str. 2A, A-5020 Salzburg, Austria

* Contact person

Description

Super-exchange most often leads to antiferromagnetism in transition-metal perovskite oxides, yet ferromagnetism or ferrimagnetism would be preferred for many applications, for example in data storage. While alloying, epitaxial strain and defects were shown to lead to ferromagnetism, engineering this magnetic order remains a challenge. We propose, based on density functional theory calculations, a novel route to defect-engineer ferrimagnetism, which is based on preferential displacements of oxygen vacancies due to finite temperature vibrations. This mechanism has an unusual temperature dependence, as it is absent at 0K, strengthens with increasing temperature before vanishing once oxygen vacancies disorder, giving it a unique experimentally detectable signature.

Files

File preview

files_description.md

All files

Files (1.7 GiB)

Name Size
md5:3f330ab278fcbe36351c18f71c84ec67
212 Bytes Preview Download
md5:5e1a7a9410a36f3e60181056eb989ba8
1.7 GiB Download
md5:f0ae805853bc3b75f35f24e766e9f4e5
1.6 KiB Preview Download

References

Preprint
M. Kaviani, C. Ricca, U. Aschauer, arXiv:2405.04630 (2024), doi: 10.48550/arXiv.2405.04630