Abstract
The disordered ferrite system, for has been studied by the Mössbauer-effect technique at 4.2 K in applied magnetic fields of 50 and 90 kOe. In these fields a ferrimagnetic structure is implied for the entire family of compounds. For the cation distribution is ()[]; for larger the iron concentration on (tetrahedral) sites decreases, and becomes less than 2 at.% by . For , some of the Fe ions on (octahedral) sites have their spin moments reversed. Within the experimental error, the magnetic moments of the iron ions are collinear for and noncollinear for . The canting angles for normal -site cations are found to increase with increasing zinc content, and to depend on the applied field. The sample with has the most stable structure. The hyperfine fields and isomer shifts show only a small variation with sample composition.
- Received 29 July 1974
DOI:https://doi.org/10.1103/PhysRevB.11.278
©1975 American Physical Society