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Raman spectra, photoluminescence and dielectric relaxation in Bi 1.5 ZnNb 1.5 O 7 pyrochlore

Liu, Yun; Withers, Raymond; Chen, Hua; Li, Qing; Tan, Hark Hoe


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...[Show more]

CollectionsANU Research Publications
Date published: 2011
Type: Journal article
Source: Current Applied Physics
DOI: 10.1016/j.cap.2011.03.014


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