Abstract
The temperature dependence of the magnetic hyperfine fields on 57Fe nuclei at the tetrahedral (A) and octahedral (B) interstitial sites in (Zn, Cd, Cu)0.5Ni0.5Fe2O4 oxides have been investigated in Mössbauer measurements at sample temperatures ranging from 79 K to 850 K. The samples were prepared by solid-state reaction, and their phase determined from XRD measurements, which also provided information on their X-ray densities, grain sizes and lattice constants. The magnetic transition temperatures between ordered and paramagnetic states were obtained from zero-velocity measurements. The Cu0.5Ni0.5Fe2O4 sample is found to be antiferromagnetic with Néel temperature of 823 K, and its super-exchange interactions, J AB, J AA and J BB were determined to be −24.14 kB, −13.10 kB and +11.68 kB, respectively. The (Zn, Cd)0.5Ni0.5Fe2O4 are ferrimagnetic with Curie points of 543 and 548 K, respectively, and corresponding average exchange integrals J o = 186 kB and 188 kB.
Key Words
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Singh K. A., Verma A., Thakur O. P., Prakash C., Goel T. C. and Mendiratta R. G., Mater. Lett. 57 (2003), 1040.
Costa A. C. F. M., Tortella E., Morelli M. R., Kiminami R. H. G. A., J. Magn. Magn. Mater. 256 (2003), 174.
Oak H. N., Baek K. S. and Kim S. J., Phys. Status Solidi, B 208 (1998), 249.
Kim W. C., Kim S. J. and Kim C. S., J. Magn. Magn. Mater. 239 (2002), 82.
Msomi J. Z., Moyo T. and Bharuth-Ram K., Hyperfine Interact. C5 (2002), 181.
Moyo T., Msomi J. Z. and Bharuth-Ram K., Hyperfine Interact. 136(3) (2002), 579.
Read D. A., Moyo T., Jassim S., Dunlap R. A. and Hallam G. C., J. Magn. Magn. Mater. 82 (1989), 87.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2005 Springer
About this paper
Cite this paper
Msomi, J.Z., Bharuth-Ram, K., Naicker, V.V., Moyo, T. (2005). Mössbauer Studies on (Zn, Cd, Cu)0.5Ni0.5Fe2O4 Oxides. In: Maier, K., Vianden, R. (eds) HFI/NQI 2004. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-30924-1_24
Download citation
DOI: https://doi.org/10.1007/3-540-30924-1_24
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-30923-9
Online ISBN: 978-3-540-30924-6
eBook Packages: Physics and AstronomyPhysics and Astronomy (R0)