Direct observation of electron doping in La0.7Ce0.3MnO3 using x-ray absorption spectroscopy -: art. no. 092404

被引：194

作者：

Mitra, C

Hu, Z

Raychaudhuri, P

Wirth, S

Csiszar, SI

Hsieh, HH

Lin, HJ

Chen, CT

Tjeng, LH

机构：

[1] Max Planck Inst Chem Phys Solids, D-01187 Dresden, Germany

[2] Univ Cologne, Inst Phys 2, D-50937 Cologne, Germany

[3] Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England

[4] Univ Groningen, Ctr Mat Sci, NL-9747 AG Groningen, Netherlands

[5] Synchrotron Radiat Res Ctr, Hsinchu 30077, Taiwan

来源：

PHYSICAL REVIEW B | 2003年 / 67卷 / 09期

关键词：

D O I：

10.1103/PhysRevB.67.092404

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report an x-ray absorption spectroscopic (XAS) study on thin films of La0.7Ce0.3MnO3. The measurements clearly show that the cerium is in the Ce(IV) valence state, and that the manganese is present in a mixture of Mn2+ and Mn3+ valence states. These data demonstrate that La0.7Ce0.3MnO3 is an electron-doped colossal magnetoresistive manganite, a finding that may open up opportunities for device applications as well as for further research on the colossal magnetoresistance phenomenon in these materials.

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