Temperature and pressure-induced spin-state transitions in LaCoO3

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

2005-10-21

arxiv.org/abs/cond-mat/0510569v1

Phys. Rev. B 73, 024424 (2006)

Physics

Condensed Matter

Strongly Correlated Electrons

Scientific paper

10.1103/PhysRevB.73.024424

We report the continuous variation of the spin moment of cobalt in LaCoO3 across its temperature and pressure-induced spin transitions evidenced with K\beta 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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