Magnetic Ordering in Oxide Solid Solutions.
Abstract
Powder neutron diffraction, magnetic susceptibility and Mossbauer spectroscopy are being used to investigate solid solutions based upon MnO, FeO, CoO and NiO. During the last twelve months, we have completed measurements on NiO-CoO and MnO-CoO, and made preliminary studies in the systems NiO-MnO, FeO-MnO and FeO-CoO. In each system we have examined the changes of spin direction and crystal symmetry as a function of temperature and pressure in the antiferromagnetic phases. The results so far suggest that the strength of the magnetic anisotropy associated with the metal ions falls in the sequence Co(2+) > Mn(2+) >> Fe(2+) approx Ni(2+). This order is unexpected and we are carrying out further experiments and calculations in order to obtain a better understanding of the interactions in these systems. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 13, 1981
- Accession Number
- ADA096886
Entities
People
- A. K. Cheetham
Organizations
- University of Oxford