Abnormal electronic transition variations of lanthanum-modified lead zironate stannate titanate ceramics near morphotropic phase boundary: A spectroscopic evidence

被引：15

作者：

Chen, X. ^{[1
]}

Jiang, K. ^{[1
]}

Hu, Z. G. ^{[1
]}

Chen, X. F. ^{[2
]}

Wang, G. S. ^{[2
]}

Dong, X. L. ^{[2
]}

Chu, J. H. ^{[1
]}

机构：

[1] E China Normal Univ, Dept Elect Engn, Key Lab Polar Mat & Devices, Minist Educ, Shanghai 200241, Peoples R China

[2] Chinese Acad Sci, Shanghai Inst Ceram, Shanghai 200050, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2012年 / 101卷 / 01期

关键词：

THIN-FILMS; DIELECTRIC FUNCTIONS; SINGLE-CRYSTALS; ZIRCONATE; PROGRESS; GROWTH;

D O I：

10.1063/1.4733683

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The structure-related optical response of (Pb1-1.5xLax)(Zr0.42Sn0.40Ti0.18)O-3 (100x/42/40/18) ceramics with different compositions has been investigated. Based on x-ray diffraction, the phase transition from rhombohedral to tetragonal structure is revealed between compositions of x = 2.6% and 2.8% near morphotropic phase boundary (MPB). Correspondingly, abnormal spectral response in the photon energy from 1.4 to 6.1 eV is observed near MPB. Furthermore, the blue shift of the two critical points related parameters, which is obtained from fitting the reflectance spectra, indicates that the variation of electronic band structure near MPB is responsible for the anomalous behavior. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4733683]

引用

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