کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1462497 989633 2012 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Influence of in-situ magnetic field pressing on the structural and multiferroic behaviour of BiFeO3 ceramics
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Influence of in-situ magnetic field pressing on the structural and multiferroic behaviour of BiFeO3 ceramics
چکیده انگلیسی

Polycrystalline single phase BiFeO3 (BFO) ceramic samples have been prepared by conventional solid state sintering and also by in-situ magnetic field pressing followed by solid state sintering. The influence of in-situ magnetic field pressing on the structural, magnetic, ferroelectric and thermal properties has been investigated in this work. X-ray diffraction analysis and Reitveld refinement shows the single phase characteristics of BFO samples. Further texture formation and the development of compressive lattice strain have been observed in the magnetic field pressed samples. A change in Fe–O–Fe bond angle and suppression of spiral spin structure results in the enhanced magnetization value Ms = 136 memu/g at 2 T. Similarly spontaneous polarization has also improved with a Pmax value of 1.3 μC/cm2. DSC plot shows a significant variation in heat flow and enthalpy at the Neel transition (TN = 372 °C) and ferro to paraelectric transition (TC = 820 °C) for the magnetic field pressed BFO samples.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 38, Issue 2, March 2012, Pages 1093–1098
نویسندگان
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