Effects of Fe doping in the colossal magnetoresistive La{sub 1{minus}x}Ca{sub x}MnO{sub 3}

Journal Article · Tue Apr 01 04:00:00 EST 1997 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.364584· OSTI ID:496602

Ahn, K H; Wu, X W; Liu, K; Chien, C L ^[1]

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1. Department of Physics and Astronomy, The Johns Hopkins University, Baltimore, Maryland 21218 (United States)

The effect of Fe doping ({lt}20{percent}) on the Mn site in the ferromagnetic (x=0.37) and the antiferromagnetic (x=0.53) phases of La{sub 1{minus}x}Ca{sub x}MnO{sub 3} has been studied. Upon doping, no appreciable structure changes have been found in either series. However, conduction and ferromagnetism have been consistently suppressed by Fe doping. Colossal magnetoresistance has been shifted to lower temperatures, and in some cases enhanced by Fe doping. These results are not due to the strong lattice effects commonly seen in doping of the La sites. Rather, replacement of Mn{sup 3+} by Fe{sup 3+} depopulates the hopping electrons, and weakens the double exchange. The effect of Fe doping can be explained in terms of the band structure. {copyright} {ital 1997 American Institute of Physics.}

• OSTI ID: 496602
• Report Number(s): CONF-961141--
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 8 Vol. 81; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANTIFERROMAGNETIC MATERIALS
CALCIUM COMPOUNDS
CALCIUM OXIDES
CRYSTAL DOPING
ELECTRONIC STRUCTURE
FERROMAGNETIC MATERIALS
FERROMAGNETISM
IRON ADDITIONS
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
MAGNETORESISTANCE
MANGANESE OXIDES