![Sample our Physical Sciences journals, sign in here to start your FREE access for 14 days]({"type":"image" , "src" : "/sda/110819/TOC-Subject-Sample-2021-Physical-Sciences.jpg"})
Abstract
The Raman spectra in (1−x)Pb(Zn 1/3 Nb 2/3 )O3 − xPbTiO 3 (PZN-xPT) mixed crystals were measured under several optical geometries below 400 cm − 1 . Raman modes in the low frequency region were assigned on the basis of our spectrum in the poled sample of PZN-20%PT. Low frequency Raman modes in PZN-PT (x ≤ 20%) were confirmed to be primarily caused by ferroelectric modes rather than 1:1 B-site ordering. It was found that the Raman scattering is sensitive for the inhomogeneous ferroelectric distortion or existence of the polar nano-region in the cubic phase of the PZN-type relaxor. Both the E(TO1) and A 1 (TO1) modes, corresponding to the soft modes in PbTiO 3 , do not almost depend on temperature near the ferroelectric phase transition point in PZN-PT (x ≤ 20%).
Acknowledgment
The authors thank Mr. W. Tomoda from Innovation Joint Research Center, Shizuoka University for the maintenance of the Raman scattering equipment. This work was supported in part by Grants-in-Aid for Scientific Research (B) (No. 19340084) from the Japan Society for the Promotion of Science for MI.