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Analysis of paramagnetic Mössbauer relaxation spectra by ab initio methods

  • Relaxation Effects Diffusion
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Abstract

Mössbauer spectra of LiNbO3:Fe(III)-single crystals at various external fields and temperatures are least-squares fitted using a static spin-Hamiltonian and appropriate relaxation matrices. An electronic secular approximation is used to reduce the number of the relaxation matrix elements. The results forH ext=0 cannot be explained by a dynamical spin-Hamiltonian. The relaxation frequency for the spectra withH ext=1.5 and 3 T is independent of energy and proportional toT 2, thus excluding a direct process.

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Authors and Affiliations

  1. Depto- de Física, ICEx, UFMG, C.P. 702, 30161, Belo Horizonte MG, Brazil

    H. -D. Pfannes

  2. FBI-Tracer-Oceanography, Universität Bremen, 2800, Bremen 33, FRG

    A. Putzka

Authors
  1. H. -D. Pfannes
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  2. A. Putzka
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Pfannes, H.D., Putzka, A. Analysis of paramagnetic Mössbauer relaxation spectra by ab initio methods. Hyperfine Interact 56, 1477–1481 (1990). https://doi.org/10.1007/BF02405461

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  • DOI: https://doi.org/10.1007/BF02405461

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