The Nuclear Quadrupole Interaction of Fe57 in Spinel Type Oxides
- 1 September 1963
- journal article
- research article
- Published by Physical Society of Japan in Journal of the Physics Society Japan
- Vol. 18 (9), 1301-1306
- https://doi.org/10.1143/jpsj.18.1301
Abstract
The nuclear quadrupole interaction of Fe 57 in spinel type oxides was investigated by means of Mössbauer experiments of the 14.4 keV gamma rays from Fe 57m . On octahedral sites in ZnFe 2 O 4 , a spectrum split symmetrically into two lines was observed in paramagnetic state, which is attributed to the nuclear quadrupole splitting in ferric ions arising from the trigonal field on B site. As for tetrahedral sites of the spinel structure, similar spectra to the former case were observed in FeNiAlO 4 and FeNiCrO 4 . The origin of the quadrupole interaction in these samples is considered to be due to the distribution of divalent and trivalent ions on B sites which establishes the local charge neutrality. In FeAl 2 O 4 , which has homogeneous B sites, only one sharp absorption dip was observed.Keywords
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