Temperature- and pressure-induced spin-state transitions in LaCoO3 -: art. no. 024424

被引：157

作者：

Vankó, G

Rueff, JP

Mattila, A

Németh, Z

Shukla, A

机构：

[1] European Synchrotron Radiat Facil, F-75231 Paris 9, France

[2] Univ Paris 06, UMR CNRS 7614, Lab Chim Phys Mat & Rayonnement, F-75231 Paris 05, France

[3] Univ Helsinki, Dept Phys Sci, Div Xray Phys, FIN-00014 Helsinki, Finland

[4] Eotvos Lorand Univ, Dept Nucl Chem, H-1118 Budapest, Hungary

[5] Univ Paris 06, Inst Mineral & Phys Milieux Condensees, F-75252 Paris 05, France

来源：

PHYSICAL REVIEW B | 2006年 / 73卷 / 02期

关键词：

D O I：

10.1103/PhysRevB.73.024424

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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.

引用

页数：9

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