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Article Dans Une Revue Physical Review B: Condensed Matter and Materials Physics (1998-2015) Année : 2006

Temperature- and pressure-induced spin-state transitions in LaCoO3

Résumé

We report the continuous variation of the spin moment of cobalt in LaCoO3 across its temperature and pressure-induced spin transitions evidenced with Kbeta emission spectra. The first thermal transition is best described by a transition to an orbitally nondegenerate intermediate spin (S=1) state. In parallel, continuous redistribution of the 3d electrons is also indicated by partial fluorescence yield x-ray absorption spectra. At high pressure, our study confirms that the material becomes low spin between 40 and 70 kbar at room temperature.

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hal-00127992 , version 1 (30-01-2007)

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Gyorgy Vankó, Jean-Pascal Rueff, Aleksi Mattila, Zoltán Németh, Abhay Shukla. Temperature- and pressure-induced spin-state transitions in LaCoO3. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2006, 73, pp.024424. ⟨10.1103/PhysRevB.73.024424⟩. ⟨hal-00127992⟩
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