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http://repository.kln.ac.lk/handle/123456789/4092
Title: | A Mössbauer effect study of barium ferrite ball-milled in air |
Authors: | Jayasuriya, K.D. Kaczmarek, W.A. Wu, E. Campbell, S.J. |
Keywords: | X-rays Measure theory |
Issue Date: | 1994 |
Publisher: | Hyperfine Interactions |
Abstract: | The effects of dry-milling BaFe12O19 in air for periods of 190, 360, 590, 690 and 1000 h have been investigated by X-ray diffraction and M�ssbauer effect measurements. The sizes of the BaFe12O19 particles decrease on milling, as expected, although a partial decomposition of BaFe12O19 to ?-Fe2O3 is found to take place on extended milling (1000 h). The room temperature M�ssbauer spectra are consistent with superparamagnetic relaxation associated with the fine BaFe12O19 and ?-Fe2O3 particles. The X-ray diffraction patterns of all the milled samples exhibit features indicative of a disordered structural state, consistent with the nanoscale particles and a nanostructured state. |
URI: | http://repository.kln.ac.lk/handle/123456789/4092 |
ISSN: | 0304-3843 (print version),1572-9540 (electronic version) |
Appears in Collections: | Physics |
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