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Ferrimagnetism induced by thermal vibrations in oxygen-deficient manganite heterostructures

Moloud Kaviani1, Chiara Ricca1, Ulrich Aschauer1,2*

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

* Corresponding authors emails: ulrichjohannes.aschauer@plus.ac.at
DOI10.24435/materialscloud:4f-2w [version v1]

Publication date: May 13, 2024

How to cite this record

Moloud Kaviani, Chiara Ricca, Ulrich Aschauer, Ferrimagnetism induced by thermal vibrations in oxygen-deficient manganite heterostructures, Materials Cloud Archive 2024.70 (2024), https://doi.org/10.24435/materialscloud:4f-2w


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.

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External references

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


Ferrimagnetism Oxygen vacancy Perovskite manganite MARVEL/DD5

Version history:

2024.70 (version v1) [This version] May 13, 2024 DOI10.24435/materialscloud:4f-2w