Spin-state transition in Pr0.5Ca0.5CoO3 analyzed by x-ray absorption and emission spectroscopies

被引：43

作者：

Herrero-Martin, J. ^{[1
]}

Garcia-Munoz, J. L. ^{[1
]}

Kvashnina, K. ^{[2
]}

Gallo, E. ^{[2
]}

Subias, G. ^{[3
]}

Alonso, J. A. ^{[4
]}

Baron-Gonzalez, A. J. ^{[1
]}

机构：

[1] CSIC, Inst Ciencia Mat Barcelona, ICMAB, E-08193 Barcelona, Spain

[2] European Synchrotron Radiat Facil, F-38043 Grenoble 9, France

[3] Univ Zaragoza, CSIC, Inst Ciencia Mat Aragon, E-50009 Zaragoza, Spain

[4] CSIC, Inst Ciencia Mat, E-28049 Madrid, Spain

来源：

PHYSICAL REVIEW B | 2012年 / 86卷 / 12期

关键词：

LACOO3; PEROVSKITE;

D O I：

10.1103/PhysRevB.86.125106

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present a study of the Co spin-state changes in Pr0.5Ca0.5CoO3 across the metal-insulator transition by means of the analysis of two complementary synchrotron x-ray spectroscopic techniques. Recorded experimental and charge transfer multiplet-based calculated Co L-2,L-3 absorption spectra, in combination with Co K beta main emission lines, indicate that Co3+ ion spin state evolves from low in the insulating phase to a low: high mixed state in the metallic regime, close to a 1:1 ratio at ambient temperature. A pure high spin state can be discarded, while the occurrence of an intermediate state is also questioned.

引用

页数：6

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