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Charge states of transition metal in “Cr, Co and Ni” doped Ln0.5Ca0.5MnO3 CMR manganites

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Abstract:

The XAS study at Cr, Co, Ni and Mn K-edges was performed for the doped CMR manganites Ln0.5Ca0.5Mn1-xBxO3 with Ln=La, Nd, Sm and B= Cr, Co, Ni (\((0 \le x \le 0.10)\)), on the samples that were studied previously for their ferromagnetic-metallic to antiferromagnetic-insulator transition. We observed that the formal charges of the doping elements are Ni2+, Co2+ and Cr3+. It is also evidenced that the average formal charge of the manganese is increased after doping, in agreement with the charge compensation keeping “O3” stoichiometry. These results suggest that the doping elements participate directly to the band structure.

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Authors and Affiliations

  1. Laboratoire CRISMAT (UMR 6508), associée au CNRS, ISMRA, boulevard Maréchal Juin, 14050, Caen Cedex, France

    O. Toulemonde, F. Studer, A. Barnabé, A. Maignan, C. Martin & B. Raveau

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  1. O. Toulemonde
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  2. F. Studer
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  3. A. Barnabé
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  4. A. Maignan
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  5. C. Martin
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  6. B. Raveau
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Received: 9 January 1998 / Received in final form: 6 April 1998 / Accepted: 7 April 1998

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Toulemonde, O., Studer, F., Barnabé, A. et al. Charge states of transition metal in “Cr, Co and Ni” doped Ln0.5Ca0.5MnO3 CMR manganites. Eur. Phys. J. B 4, 159–167 (1998). https://doi.org/10.1007/s100510050364

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  • DOI: https://doi.org/10.1007/s100510050364

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