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  Mechanism of spin crossover in LaCoO3 resolved by shape magnetostriction in pulsed magnetic fields

Rotter, M., Wang, Z.-S., Boothroyd, A. T., Prabhakaran, D., Tanaka, A., & Doerr, M. (2014). Mechanism of spin crossover in LaCoO3 resolved by shape magnetostriction in pulsed magnetic fields. Scientific Reports, 4: 7003, pp. 1-4. doi:10.1038/srep07003.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0024-9B4D-6 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002C-0AF1-2
Genre: Journal Article

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 Creators:
Rotter, M.1, Author              
Wang, Z.-S.2, Author
Boothroyd, A. T.2, Author
Prabhakaran, D.2, Author
Tanaka, A.2, Author
Doerr, M.2, Author              
Affiliations:
1Martin Rotter, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863453              
2External Organizations, ou_persistent22              

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 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 H-c approximate to 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 H-c. The results, supported by electronic energy calculations by the configuration interaction cluster method, provide compelling evidence that above H-c LaCoO3 adopts a correlated low spin/high spin state.

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Language(s): eng - English
 Dates: 2014-11-11
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: ISI: 000344760100018
DOI: 10.1038/srep07003
 Degree: -

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Title: Scientific Reports
Source Genre: Journal
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Publ. Info: London, UK : Nature Publishing Group
Pages: - Volume / Issue: 4 Sequence Number: 7003 Start / End Page: 1 - 4 Identifier: Other: 2045-2322
CoNE: /journals/resource/2045-2322