کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8208192 | 1531901 | 2018 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Temperature-dependent electron paramagnetic resonance detect oxygen vacancy defects and Cr valence of tetragonal Ba(Ti1âxCrx)O3 ceramics
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک و نجوم (عمومی)
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
Temperature-dependent electron paramagnetic resonance (EPR) study was employed to detect oxygen vacancy defects in the tetragonal Ba(Ti1âxCrx)O3 (xâ¯=â¯5%) ceramic for the first time. In the rhombohedral phase below â150â¯Â°C, an EPR signal at gâ¯=â¯1.955 appeared in the insulating Ba(Ti1âxCrx)O3 (xâ¯=â¯5%) ceramic with an electrical resistivity of 108â¯Î©â¯cm and was assigned to ionized oxygen vacancy defects. Ba(Ti1âxCrx)O3 ceramics exhibited a tetragonal structure except Ba(Ti1âxCrx)O3 (xâ¯=â¯10%) with a tetragonal-hexagonal mixed phase and a first-order phase transition dielectric behavior (εâ²mâ¯>â¯11,000). Mixed valence Cr ions could coexist in ceramics, form CrTiâ²-VO or CrTi-TiTiâ² defect complexes and make no contribution to a dielectric peak shift towards low temperature.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Results in Physics - Volume 8, March 2018, Pages 190-193
Journal: Results in Physics - Volume 8, March 2018, Pages 190-193
نویسندگان
Dan-Dan Han, Da-Yong Lu, Fan-Ling Meng, Xin-Yu Yu,