NDLI: Mössbauer Studies on (Zn, Cd, Cu)0.5Ni0.5Fe2O4 Oxides

Content Provider	Springer Nature Link
Author	Msomi, J. Z. Bharuth Ram, K. Naicker, V. V. Moyo, T.
Copyright Year	2005
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.
Starting Page	151
Ending Page	156
Page Count	6
File Format	PDF
ISSN	03043843
Journal	Hyperfine Interactions
Volume Number	158
Issue Number	1-4
e-ISSN	15729540
Language	English
Publisher	Springer Netherlands
Publisher Date	2005-10-11
Publisher Place	Dordrecht
Access Restriction	Subscribed
Subject Keyword	Mössbauer spectroscopy spinel oxides super-exchange interaction transition temperatures Surfaces and Interfaces, Thin Films Condensed Matter Atoms, Molecules, Clusters and Plasmas Nuclear Physics, Heavy Ions, Hadrons
Content Type	Text
Resource Type	Article
Subject	Nuclear and High Energy Physics Atomic and Molecular Physics, and Optics Physical and Theoretical Chemistry Condensed Matter Physics

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