Pal, M. ; Brahma, P. ; Chakravorty, D. ; Bhattacharyya, D. ; Maiti, H. S. (1996) Nanocrystalline nickel-zinc ferrite prepared by the glass-ceramic route Journal of Magnetism and Magnetic Materials, 164 (1-2). pp. 256-260. ISSN 0304-8853
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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S03048...
Related URL: http://dx.doi.org/10.1016/S0304-8853(96)00325-3
Abstract
Ni0.5Zn0.5Fe2O4 crystals having dimensions in the range 15-29 nm have been grown within borate glass by a two-stage heat treatment in the temperature range 873-953 K. Magnetic measurements have been carried out over the temperature range 20-300 K. The maximum coercive force corresponding to 0 K, (Hco) ~334 Oe, is obtained for a sample containing ferrite crystals of median diameter 15 nm. Field-cooled and zero-field-cooled magnetization data for different samples are consistent with the blocking temperatures extracted from the variation of coercive force as a function of temperature. The magnetocrystalline anisotropy constant for nanocrystalline nickel-zinc ferrite is found to be an order of magnitude higher than that for the bulk material.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | Ferrite; Coercivity; Magnetocrystalline Anisotropy; Crystal Growth |
| ID Code: | 7384 |
| Deposited On: | 23 Oct 2010 09:02 |
| Last Modified: | 28 May 2011 04:44 |
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