Effects of Fe doping in the colossal magnetoresistive La1-xCaxMnO3

K. H. Ahn; X. W. Wu; K. Liu; C. L. Chien

doi:10.1063/1.364584

Effects of Fe doping in the colossal magnetoresistive La_1-xCa_xMnO₃

K. H. Ahn, X. W. Wu, K. Liu, C. L. Chien

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118 Scopus citations

Abstract

The effect of Fe doping (<20%) on the Mn site in the ferromagnetic (x = 0.37) and the antiferromagnetic (x = 0.53) phases of La_1-xCa_xMnO₃ 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 sties. Radier, replacement of Mn³⁺ by Fe³⁺ depopulates the hopping electrons, and weakens the double exchange. The effect of Fe doping can be explained in terms of the band structure.

Original language	English (US)
Pages (from-to)	5505-5507
Number of pages	3
Journal	Journal of Applied Physics
Volume	81
Issue number	8 PART 2B
DOIs	https://doi.org/10.1063/1.364584
State	Published - Apr 15 1997
Externally published	Yes

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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title = "Effects of Fe doping in the colossal magnetoresistive La1-xCaxMnO3",

abstract = "The effect of Fe doping (<20%) on the Mn site in the ferromagnetic (x = 0.37) and the antiferromagnetic (x = 0.53) phases of La1-xCaxMnO3 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 sties. Radier, replacement of Mn3+ by Fe3+ depopulates the hopping electrons, and weakens the double exchange. The effect of Fe doping can be explained in terms of the band structure.",

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T1 - Effects of Fe doping in the colossal magnetoresistive La1-xCaxMnO3

AU - Ahn, K. H.

AU - Wu, X. W.

AU - Liu, K.

AU - Chien, C. L.

PY - 1997/4/15

Y1 - 1997/4/15

N2 - The effect of Fe doping (<20%) on the Mn site in the ferromagnetic (x = 0.37) and the antiferromagnetic (x = 0.53) phases of La1-xCaxMnO3 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 sties. Radier, replacement of Mn3+ by Fe3+ depopulates the hopping electrons, and weakens the double exchange. The effect of Fe doping can be explained in terms of the band structure.

AB - The effect of Fe doping (<20%) on the Mn site in the ferromagnetic (x = 0.37) and the antiferromagnetic (x = 0.53) phases of La1-xCaxMnO3 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 sties. Radier, replacement of Mn3+ by Fe3+ depopulates the hopping electrons, and weakens the double exchange. The effect of Fe doping can be explained in terms of the band structure.

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Effects of Fe doping in the colossal magnetoresistive La_1-xCa_xMnO₃

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