CONTROLLED-VALENCE PROPERTIES OF LA1-XSRXFEO3 AND LA1-XSRXMNO3 STUDIED BY SOFT-X-RAY ABSORPTION-SPECTROSCOPY

被引：632

作者：

ABBATE, M

DEGROOT, FMF

FUGGLE, JC

FUJIMORI, A

STREBEL, O

LOPEZ, F

DOMKE, M

KAINDL, G

SAWATZKY, GA

TAKANO, M

TAKEDA, Y

EISAKI, H

UCHIDA, S

机构：

[1] UNIV TOKYO,DEPT PHYS,BUNKYO KU,TOKYO 113,JAPAN

[2] FREE UNIV BERLIN,INST EXPTL PHYS,W-1000 BERLIN 33,GERMANY

[3] UNIV GRONINGEN,CTR MAT SCI,9747 AG GRONINGEN,NETHERLANDS

[4] KYOTO UNIV,INST CHEM RES,UJI,KYOTO 611,JAPAN

[5] MIE UNIV,DEPT CHEM,TSU,MIE 514,JAPAN

[6] UNIV TOKYO,DEPT APPL PHYS,BUNKYO KU,TOKYO 113,JAPAN

来源：

PHYSICAL REVIEW B | 1992年 / 46卷 / 08期

关键词：

D O I：

10.1103/PhysRevB.46.4511

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The controlled-valence properties of La1-xSrxFeO3 and La1-xSrxMnO3 are studied by means of soft-x-ray absorption spectroscopy. A comparison between the transition-metal 2p spectra and atomic-multiplet calculations is used to determine the 3d count. The 0 Is spectrum is used to characterize changes in unoccupied states that contain oxygen p character. The results indicate that the holes induced by substitution for both series are located in states of mixed metal 3d -oxygen 2p character. The ground state of LaFeO3 is mainly 3d5 and becomes 3d5L (where L denotes a ligand hole) in the La1-xSrxFeO3 series for low Sr concentration. The main component of the ground state of LaMnO3 is 3d4 and becomes a mixture of 3d3 and 3d4L in the La1-xSrxMnO3 series. The trends in controlled-valence properties of similar oxides across the transition-metal series can be rationalized within the framework of the Zaanen-Sawatzky-Allen model.

引用

页码：4511 / 4519

页数：9

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