Chatterjee, A. ; Das, D. ; Pradhan, S. K. ; Chakravorty, D. (1993) Synthesis of nanocrystalline nickel-zinc ferrite by the sol-gel method Journal of Magnetism and Magnetic Materials, 127 (1-2). pp. 214-218. ISSN 0304-8853
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Official URL: http://linkinghub.elsevier.com/retrieve/pii/030488...
Related URL: http://dx.doi.org/10.1016/0304-8853(93)90217-P
Abstract
Ni0.5Zn0.5Fe2O4 crystals having dimensions varying from 13 to 35 nm have been synthesized within a silica glass matrix by a sol-gel method. Particle sizes in the above range can be controlled by a suitable heat treatment schedule at temperatures varying from 973 to 1323 K. The coercivity values for different heat-treated samples are found to be in the range 20-95 Oe, which are significantly larger than that for samples having grain sizes of the order of a few microns. The Mossbauer spectra of the samples show the presence of ultrafine particles exhibiting superparamagnetic relaxation.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| ID Code: | 7380 |
| Deposited On: | 23 Oct 2010 08:56 |
| Last Modified: | 28 May 2011 04:50 |
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