Journal article
Mechanism of spin crossover in LaCoO3 resolved by shape magnetostriction in pulsed magnetic fields
- Abstract:
- In the scientific description of unconventional transport properties of oxides (spin-dependent transport, superconductivity etc.), the spin-state degree of freedom plays a fundamental role. Because of this, temperature- or magnetic field-induced spin-state transitions are in the focus of solid-state physics. Cobaltites, e.g. LaCoO3, are prominent examples showing these spin transitions. However, the microscopic nature of the spontaneous spin crossover in LaCoO3 is still controversial. Here we report magnetostriction measurements on LaCoO3 in magnetic fields up to 70 T to study the sharp, field-induced transition at Hc ≈ 60 T. Measurements of both longitudinal and transversal magnetostriction allow us to separate magnetovolume and magnetodistortive changes. We find a large increase in volume, but only a very small increase in tetragonal distortion at Hc. The results, supported by electronic energy calculations by the configuration interaction cluster method, provide compelling evidence that above Hc LaCoO3 adopts a correlated low spin/high spin state.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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(Preview, Version of record, pdf, 1.3MB, Terms of use)
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- Publisher copy:
- 10.1038/srep07003
Authors
- Publisher:
- Springer Nature
- Journal:
- Scientific Reports More from this journal
- Volume:
- 4
- Article number:
- 7003
- Publication date:
- 2014-11-11
- Acceptance date:
- 2014-10-22
- DOI:
- EISSN:
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2045-2322
- Language:
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English
- Keywords:
- UUID:
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uuid:4c2a0e1a-c34c-4c54-8bbc-2fcfc66f469d
- Local pid:
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pubs:489454
- Source identifiers:
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489454
- Deposit date:
-
2014-11-21
Terms of use
- Copyright holder:
- Rotter, M et al
- Copyright date:
- 2014
- Notes:
- © 2014 Rotter, M et al. This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder in order to reproduce the material.
- Licence:
- CC Attribution (CC BY)
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