Direct observation of electron doping in La0.7Ce0.3MnO3 using x-ray absorption spectroscopy
- Mitra, C
- Hu, Z
- Raychaudhuri, P
- Wirth, S
- Csiszar, SI
- Hsieh, HH
- Lin, HJ
- Chen, CT
- Tjeng, LH
Publication date
March 2003
DOI Publisher
American Physical Society (APS) ISSN
0163-1829Abstract
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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