Mössbauer spectroscopy study of aluminium substituted nickel-ferrites

被引:0
|
作者
Abdel-Fatah D. Lehlooh
Jamshid Amighian
Sami H. Mahmood
机构
[1] Yarmouk University,Physics Department
[2] University of Isfahan,Physics Department
来源
Hyperfine Interactions | 2008年 / 183卷
关键词
Mössbauer spectroscopy; X-ray diffraction; Ni ferrites; Spinel structure;
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学科分类号
摘要
Powders of Al substituted Ni-ferrites (NiAlxFe2 − xO4x = 0, 0.5, 1.0 and 1.5) were prepared using the calcination method. Mössbauer spectroscopy results of all samples show two well defined magnetic sextets corresponding to Fe3 +  ions in the A (tetrahedral) and B (octahedral) sites of the spinel structure. In addition, a quadrupole doublet with quadrupole splitting of (~0.53 mm/s) starts evolving upon Al substitution. This doublet is associated with a new Fe–Al-oxide phase. The X-ray diffraction patterns show, in addition to the original peaks, new peaks evolve and increase in intensity as the Al concentration increases, confirming the evolution of this new phase.
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页码:193 / 198
页数:5
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