Abstract
The substitution of copper for manganese in one position of the double distorted perovskite Ca(CuxMn3−x )Mn4O12 leads to a change in the valence of manganese atoms in the other position. This is accompanied by a sharp increase in the temperature of magnetic ordering and by a change in the conductivity type from semiconductor to metallic. These perovskites also exhibit a negative magnetoresistance in a broad temperature range, with the [ρ(H)−ρ(0)]× 100%/ρ(0) ratio (at liquid nitrogen temperature) reaching 10% in a field of 1 T.
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Translated from Zhurnal Éksperimental’no\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) i Teoretichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) Fiziki, Vol. 128, No. 2, 2005, pp. 422–427.
Original Russian Text Copyright © 2005 by Vasil’ev, Volkova, Goodilin.
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Vasil’ev, A.N., Volkova, O.S. & Goodilin, E.A. Negative magnetoresistance in binary distorted perovskites Ca(CuxMn3−x )Mn4O12 . J. Exp. Theor. Phys. 101, 367–371 (2005). https://doi.org/10.1134/1.2047803
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DOI: https://doi.org/10.1134/1.2047803