Abstract
The Mössbauer spectra of tetragonal copper ferrite are investigated between 298 and 613 K. The spectra consist of a super-position of two six-line patterns corresponding to Fe3+ at the B site (pattern I) and A site (pattern II) of the crystal structure on the basis of their relative isomer shifts, hyperfine fields and quadrupole interactions. The intensity ratio of the two patterns agree to within 15% error with the ratio of Fe site occupancy factors determined by X-ray diffraction methods. The temperature variations of isomer shifts and quadrupole interactions show a sudden change in the temperature region 350 to 425 K for both sites which is an indication of a transition. This transition has been identified to be a non-cubic to tetragonal one and it is due to co-operative Jahn-Teller-type crystal distortions.
Article PDF
Similar content being viewed by others
Explore related subjects
Discover the latest articles, news and stories from top researchers in related subjects.Avoid common mistakes on your manuscript.
References
T. Miyadai andD. Seino, Proceedings of the International Conference Japan, July, (Kytu Publications, Japan, 1970) p. 54.
Y. Yamada andT. Mitui,J. Phys. Soc. Japan 17 (1962) 1897.
B. J. Evans andS. S. Hafner,J. Phys. Chem. Solids 29 (1968) 1573.
L. Well, E. F. Bertaut andL. Bochirol,J. Phys. Radium 11 (1950) 208.
H. Ohnishi andT. Teranishi,J. Phys. Soc. Japan 16 (1961) 35.
K. Stierstadt andW. A. Kafka,Z. Angew Phys. 22 (1967) 91.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Kulkarni, R.G., Patil, V.U. Jahn-Teller-type crystal distortions in copper ferrite. J Mater Sci 15, 2221–2223 (1980). https://doi.org/10.1007/BF00552309
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00552309