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Magnetic properties of Mn-substituted GdCoxMn1−xO3 and LaCoxMn1−xO3
Authors:P Barahona  O Pea  AB Antunes  C Campos  G Pecchi  Y Moreno  C Moure  V Gil
Institution:

aUniversidad Católica del Maule, Talca, Chile

bSciences Chimiques de Rennes, UMR 6226, Université de Rennes 1, Rennes, France

cGEMA, Centro Universitário FEEVALE, Novo Hamburgo, RS, Brazil

dFacultad de Ciencias Químicas, Universidad de Concepción, Chile

eElectroceramics Department, Instituto de Cerámica y Vidrio, CSIC, Madrid, Spain

Abstract:Partial substitution of manganese by cobalt in rare-earth perovskites REMnO3 leads to unusual magnetic phenomena because of the simultaneous presence of Mn3+, Mn4+, Co2+ and Co3+ species. The magnetic nature of the RE cation plays a fundamental role in the magnetic properties. We present herein two specific families: for RE=La the magnetic behavior of the |Co+Mn| network is observed, while for Gd its strong magnetic moment interacts with the transition metals, leading to a spin reversal state. Magnetic interactions are maximized at x=0.50, as if two regimes exist: for x<0.5 Co substitutes Mn in the REMnO3 manganite, and for x>0.5 Mn substitutes Co in the RECoO3 cobaltite.
Keywords:Ferromagnetic perovskite  Spin reversal  Cooperative phenomena
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