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Distribution of electric and magnetic hyperfine fields in Fe-rich gallo-germanates

Domenii publicaţii > Fizica + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: S. Constantinescu

Editorial: SPRINGER-NETHERLAND, Hyperfine Interactions, 168, p.1121-1125, 2006.

Rezumat:

The crystal field disorder in some tetragonal and trigonal Ca-gallo-germanates, i.e., A2Fe2ZO7 and A2LnFe3Ge3O14, with A= Ba or Sr, Ln = La or Nd and Z=Ge or Si, has been studied by 57Fe Mössbauer spectroscopy. The observed distribution of the hyperfine fields is analysed from a theoretical model based on the additive perturbation approximation of crystal fields, a rigid lattice of ionic point charges and the random substitution of Fe3+/Z4+ and A2+/Ln3+.

Cuvinte cheie: distributie de campuri hiperfine, galo-germanati // hyperfine distribution gallo-germanates

URL: http://springerlink.metapress.com/content/u5l778121250/?sortorder=asc&p_o=30