Negative magnetoresistance in binary distorted perovskites Ca(CuxMn3-x)Mn4O12статья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация: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 [rho(H) - rho(0)] x 100%/rho(0) ratio (at liquid nitrogen temperature) reaching 10% in a field of 1 T. (c) 2005 Pleiades Publishing, Inc.