کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1618207 1005702 2010 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of Ba doping on magnetic and dielectric properties of nanocrystalline BiFeO3 at room temperature
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Effect of Ba doping on magnetic and dielectric properties of nanocrystalline BiFeO3 at room temperature
چکیده انگلیسی

Ba doped BiFeO3 nanocrystallines were prepared by a sol–gel method. The crystal structure and morphology of the prepared samples were characterized using X-ray diffraction analysis and transmission electron microscope, respectively. The results showed that the lattice structure of the nanocrystallines transformed from rhombohedral to tetragonal with Ba substitution increased and the average grain size of the prepared samples lay in the range of 20–70 nm. Dielectric properties and magnetic properties of the nanocrystallines were studied. Dielectric properties were measured up to high frequency ∼100 MHz. We found that suitable amount of Ba dopant was helpful to improve the dielectric properties of BFO and the nanocrystalline with 20% Ba doping on Bi sites had the best dielectric properties among the Ba doped nanocrystallines. Magnetic properties of the nanocrystallines were greatly improved due to the presence of oxygen deficiency and significant opening in the room-temperature M–H loop was observed with Ba substitution. All the nanocrystallines presented the high ratio of Mr/M from 0.462 to 0.594 and large coercivity from 3.92 to 5.16 kOe.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 507, Issue 1, 24 September 2010, Pages 29–32
نویسندگان
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