کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1795235 1023719 2008 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Crystallographic and dielectric properties of flux grown PbB1/2′B1/2″O3 (B′B″: InNb, InTa, YbNb, YbTa and MgW) single crystals
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Crystallographic and dielectric properties of flux grown PbB1/2′B1/2″O3 (B′B″: InNb, InTa, YbNb, YbTa and MgW) single crystals
چکیده انگلیسی

Single crystals of PbIn1/2Nb1/2O3 (PIN), PbIn1/2Ta1/2O3 (PIT), PbYb1/2Nb1/2O3 (PYN), PbYb1/2Ta1/2O3 (PYT) and PbMg1/2W1/2O3 (PMW) have been grown by the flux method. The PbO-based solvents were used. Transparent, light yellow and arrow like shaped PIN and PIT crystals of the perovskite structure were obtained. Small amounts of red and of octahedron habit PIN and PIT crystals of the pyrochlore type were simultaneously grown. In the case of PYN, PYT and PMW only the crystals of the perovskite structure have been grown. The transparent and brown PYN and PYT crystals of octahedron habit were obtained. The transparent, light yellow and of octahedron or truncated octahedron shape PMW crystals were grown. The crystals were characterised by X-ray and dielectric studies. They showed that as-grown PIN crystals are nearly disordered, exhibit the rhombohedral distortion of the pseudo-perovskite unit cell and reveal relaxor behaviour. The partially ordered PIT crystals show monoclinic distortion and undergo antiferroelectric–paraelectric phase transition. The PYN, PYT and PMW single crystals, characterised by chemical order in the B′/B″ ion sublattice, exhibit orthorhombic symmetry and undergo the first-order antiferroelectric–paraelectric phase transitions.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Crystal Growth - Volume 310, Issue 11, 15 May 2008, Pages 2767–2773
نویسندگان
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