کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1788277 | 1023465 | 2011 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Raman spectra, photoluminescence and dielectric relaxation in Bi1.5ZnNb1.5O7 pyrochlore
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Raman spectra, photoluminescence and dielectric relaxation in Bi1.5ZnNb1.5O7 pyrochlore Raman spectra, photoluminescence and dielectric relaxation in Bi1.5ZnNb1.5O7 pyrochlore](/preview/png/1788277.png)
چکیده انگلیسی
In this paper we investigate the origin of the dielectric relaxation characteristic of the nominally Bi1.5ZnNb1.5O7 (BZN) pyrochlore by a combined investigation of its electron diffraction and temperature-dependent micro-Raman spectra as well as its associated photoluminescence. It is found that the structural disorder and associated structural relaxation in BZN originates from short range chemical ordering of Bi/Zn in the A site of A2B2O7 pyrochlores, which can make a contribution to the overall dielectric permittivity but does not necessitate its dielectric polarisation relaxation. The origin of dielectric polarisation relaxation in BZN is probably attributed to the oxygen vacancies as well as associated defect clusters.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Current Applied Physics - Volume 11, Issue 3, Supplement, May 2011, Pages S171–S174
Journal: Current Applied Physics - Volume 11, Issue 3, Supplement, May 2011, Pages S171–S174
نویسندگان
Y. Liu, R.L. Withers, H. Chen, Q. Li, H. Tan,