Pal, M. ; Brahma, P. ; Chakravorty, D. ; Agrawal, D. C. (1995) Magnetic properties of Ba hexaferrites doped with bismuth oxide Journal of Magnetism and Magnetic Materials, 147 (1-2). pp. 208-212. 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(95)00061-5
Abstract
Ba---M hexaferrites with compositions BaO · (6 - x)Fe2O3 · xBi2O3 have been prepared with 0 ≤ x ≤ 0.4. The lattice parameter does not show any appreciable change as a function of Bi2O3 content. The saturation magnetization shows a maximum at a value of x = 0.15, whereas the coercivity shows a minimum at around the same value of x. The trend of the results is explained by invoking the presence of Bi5+ ions which give rise to Fe2+ species within the crystallites. These materials exhibit rather high values of dielectric constant; this is explained on the basis of an overlapping large polaron tunnelling mechanism.
| Item Type: | Article |
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| Source: | Copyright of this article belongs to Elsevier Science. |
| ID Code: | 7388 |
| Deposited On: | 25 Oct 2010 11:43 |
| Last Modified: | 28 May 2011 04:46 |
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