کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1595479 | 1002778 | 2007 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Structural, thermal and dielectric properties of La3/2Bi3/2Fe5O12
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Polycrystalline La3/2Bi3/2Fe5O12 (LBIO) compound was prepared by a conventional high-temperature solid-state reaction technique. Preliminary X-ray diffraction (XRD) analysis confirms the formation of single-phase compound in an orthorhombic crystal system at room temperature. The elemental content of the compound has been analysed by EDS microanalysis. Microstructural analysis by scanning electron microscopy (SEM) shows that the compound has well defined grains, which are distributed uniformly throughout the surface. Studies of temperature variation of dielectric response at various frequencies show multiple dielectric anomalies at 200 and 370 âC. It is interesting to note that the loss tangent (tanδ) seems to be reduced at higher frequencies after reaching the instrumental saturation. Also, a couple of weak endothermic peaks were observed in differential thermal analysis (DTA) corresponding to 200 and 370 âC phase transition temperature. As soon as the phase transition process sets in, the DTA curve deviate from the basal horizontal line. The ferroelectric hysteresis loop was observed by applying the electric field of 6 kV/cm.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Communications - Volume 142, Issue 8, May 2007, Pages 449-452
Journal: Solid State Communications - Volume 142, Issue 8, May 2007, Pages 449-452
نویسندگان
K. Jawahar, R.N.P. Choudhary,