Phys. Rev. B 54, 15299–15302 (1996)Magnetic properties and colossal magnetoresistance of La(Ca)MnO3 materials doped with FeReceived 1 August 1996; published in the issue dated 1 December 1996 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. The same ionic radii of Fe3+ and Mn3+ cause no structure change in either series, yet 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. Doping with Fe bypasses the usually dominant lattice effects, but depopulates the hopping electrons and thus weakens the double exchange. © 1996 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.54.15299
DOI:
10.1103/PhysRevB.54.15299
PACS:
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