Cation Distribution and Structural Instability in Pr-doped Bi4Ti3O12
Pr-doped bismuth titanate (BixPryTi3O12(∶) BPT) thin films with random orientation were fabricated on Pt/Ti/SiO2/Si substrates by rfmagnetron sputtering technique,and the structures and Raman spectra of the films were investigated.XRD studies indicated that all of the BPT films consist of single phase of a bismuth-layered structure,showing a highly (117) oriented preferential growth with a minor fraction of (001) orientation.For an increasing degree of Pr doping,Raman spectra studies revealed a substantial hardening of the vibration involving Bi atoms at the perovskite A site,whereas the Bi mode at the Bi2O2 layer is negligibly changed.From a comparison with a simple mass consideration,we identify a precise cation distribution,indicating a pronounced site selectivity of Pr ions for the A site for y ~ 1.2.
Ferroelectric Dielectric
X.A.Mei M.Chen W.K.An C.Q.Huang J.Liu A.H.Cai
Department of Physics,Hunan Institute of Science and Technology,Yueyang,414000,China
国际会议
The Fifth China International Conference on High-Performance Ceramics (第五届先进陶瓷国际研讨会(CICC-5))
长沙
英文
85-87
2007-05-10（万方平台首次上网日期，不代表论文的发表时间）