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Investigation of hyperfine interactions in RMO3 (R =La, Nd; M =Cr, Fe) antiferromagnetic perovskite oxides using PAC spectroscopy

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HFI/NQI 2007

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Abstract

The local magnetic interaction at the transition metal sites in RMO3 (R=La, Nd; M=Cr, Fe) compounds has been investigated by perturbed angular correlation (PAC) technique using 181Hf→181Ta probe nuclei. The present measurements cover a temperature range from 10 K to 1000 K. Above the respective Neel temperature, each compound shows a unique quadrupolar frequency that decreases linearly with temperature. These interactions were assigned to the radioactive probe substituting Cr or Fe sites. Below TN, a combined electric plus magnetic hyperfine interaction was observed. The magnetic interaction revealed that the super transferred hyperfine fields on 181Ta at the Cr sites in (La,Nd)CrO3 extrapolated to 0 K, are much smaller than the corresponding values at Fe sites in (La,Nd)FeO3. This difference was attributed to different distribution of d electrons in Cr3+ (3d3) and Fe3+ (3d5) ions in each compound. As the fields for Nd compounds are smaller than those for La compounds, the role of rare-earth ions in the magnetism of these oxides is also discussed.

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Authors and Affiliations

  1. Instituto de Pesquisas Energéticas e Nucleares, IPEN-CNEN/SP, São Paulo, Brazil

    A. W. Carbonari, F. H. M. Cavalcante, A. C. Junqueira, D. M. T. Leite, R. N. Saxena & J. Mestnik-Filho

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  1. A. W. Carbonari
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  2. F. H. M. Cavalcante
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  3. A. C. Junqueira
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  4. D. M. T. Leite
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  5. R. N. Saxena
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  6. J. Mestnik-Filho
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Corresponding author

Correspondence to A. W. Carbonari .

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Editors and Affiliations

  1. University of La Plata, La Plata, Argentina

    A. Pasquevich  & M. Rentería  & 

  2. Centro Brasileiro de Pesquisas Física, Rio de Janeiro, Brasil

    E. Baggio Saitovitch

  3. University of São Paulo, São Paulo, Brazil

    H. Petrilli

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Carbonari, A.W., Cavalcante, F.H.M., Junqueira, A.C., Leite, D.M.T., Saxena, R.N., Mestnik-Filho, J. (2008). Investigation of hyperfine interactions in RMO3 (R =La, Nd; M =Cr, Fe) antiferromagnetic perovskite oxides using PAC spectroscopy. In: Pasquevich, A., Rentería, M., Saitovitch, E.B., Petrilli, H. (eds) HFI/NQI 2007. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-85320-6_44

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  • DOI: https://doi.org/10.1007/978-3-540-85320-6_44

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-85319-0

  • Online ISBN: 978-3-540-85320-6

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