کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1803700 1024626 2008 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Influence of doping concentration on room-temperature ferromagnetism for Fe-doped BaTiO3 ceramics
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Influence of doping concentration on room-temperature ferromagnetism for Fe-doped BaTiO3 ceramics
چکیده انگلیسی

Ba(Ti1−xFex)O3 ceramics (x=7, 30 and 70 at%) were prepared by solid-state reaction. All samples are single-phase with 6H-BaTiO3-type hexagonal perovskite structure. Mössbauer spectra show all Fe atoms to be present as Fe3+ in BaTiO3 lattice, occupying M1 octahedral and pentahedral sites. Room-temperature ferromagnetism is exhibited and saturation magnetization gradually decreases with increasing Fe content. The observed ferromagnetism is considered to be an intrinsic property of Ba(Ti1−xFex)O3, originating from super-exchange interactions between Fe3+ in different occupational sites associated with oxygen vacancies. The variation in magnetization with Fe content is related to the ratio of pentahedral to octahedral sites and oxygen vacancies.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 320, Issue 5, March 2008, Pages 691–694
نویسندگان
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