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Enhancement of magnetoresistance in cobaltites by manganese substitution: the oxide La 0.8 Sr 0.2 Co 1-x Mn x O 3

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Abstract:

The substitution of manganese for cobalt in the perovskite La 0.8 Sr 0.2 CoO 3 has been studied. A significant increase of the magnetoresistance (MR) is obtained, reaching 60% at 5 K under 7 T for . This behavior originates from a spectacular increase of the resistivity correlated to a significant decrease of ferromagnetism by Mn doping. This enhancement of magnetoresistance can be interpreted by the growth of ferromagnetic clusters in the insulating matrix, by applying a magnetic field.

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Authors and Affiliations

  1. Laboratoire CRISMAT (UMR 6508 associée au CNRS), ISMRA et Université de Caen, 6 Boulevard du Maréchal Juin, 14050 Caen Cedex, France, , , , , , FR

    A. Maignan, C. Martin, M. Hervieu & B. Raveau

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  1. A. Maignan
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  2. C. Martin
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  3. M. Hervieu
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  4. B. Raveau
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Received 7 May 1999

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Maignan, A., Martin, C., Hervieu, M. et al. Enhancement of magnetoresistance in cobaltites by manganese substitution: the oxide La 0.8 Sr 0.2 Co 1-x Mn x O 3 . Eur. Phys. J. B 13, 41–45 (2000). https://doi.org/10.1007/s100510050008

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  • DOI: https://doi.org/10.1007/s100510050008

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