Nota de FísicaPublicado
Hyperfine Interactions Associated with Iron Substituted Superconducting Oxides
D.E. Ellis; B.D. Dunlap; E. M. B. Saitovitch; Izabel de Souza Azevedo; R. B. Scorzelli; C.M. Kimball
1988
Dados da publicação
- Autores
- D.E. Ellis; B.D. Dunlap; E. M. B. Saitovitch; Izabel de Souza Azevedo; R. B. Scorzelli; C.M. Kimball
- Tipo
- Nota de Física
- Status
- Publicado
- Data de publicação
- 1988
- Descrição
- Theoretical and experimental Mössbauer spectroscopy studies have been made concerning charge and spin densities and magnetic hyperfine fields <math>(H_{hf})\,\!</math> in iron-substituted superconducting oxides. Calculations were carried out in the self-consistent-field embedded cluster model using local density theory (SCF-X<math> \alpha\,\!</math>) with a variational atomic orbital basis. Spectral densities and changes in charge and spin density were monitored around neighboring Cu sites, as well as Fe impurity site, in <math>La_2Cu_{1-x}Fe_x0_y\,\!</math> and <math>YBa_2Cu_{3-x}Fe_x0_{7-y}\,\!</math> compounds. Mössbauer isomer shifts (IS), quadrupole splittings (QS) and <math>H_{hf}\,\!</math> are obtained by fitting multiline models to the observed spectra and are compared with SCF-X<math>\alpha\,\!</math> results for specific lattice sites. The influence of oxygen vacancies and partial oxygen disorder is modelled and compared with the experimental data on variable oxygen content and disorder.
- Ano
- 1988
- Número
- CBPF-NF-081/88
- Vínculo com tese
- Não
- Vínculo com bolsa
- Não