Light-induced absorption in lead lanthanum zirconate titanate ceramics

被引：6
|
作者：
Schaab, S. [1 ]
Granzow, T. [1 ]
Woike, Th. [2 ]
Schaniel, D. [2 ]
机构：
[1] Tech Univ Darmstadt, Inst Sci Mat, D-64287 Darmstadt, Germany
[2] Univ Cologne, Inst Phys 1, D-50937 Cologne, Germany
来源：
JOURNAL OF APPLIED PHYSICS | 2009年 / 105卷 / 02期
关键词：
defect states; energy gap; infrared spectra; lanthanum compounds; lead compounds; piezoceramics; transparency; visible spectra; PLZT CERAMICS; FERROELECTRIC MEMORIES; PARAMAGNETISM; FILM;
D O I：
10.1063/1.3065096
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Transient light-induced absorption in the near infrared (IR) and visible (vis) spectral range is observed in transparent lanthanum-modified lead zirconate titante piezoelectric ceramics by means of a pump-and-probe-type experiment after pulsed illumination with 532 nm. Its temporal behavior in the IR range is satisfactorily described by a single stretched exponential function, whereas in the vis range a sum of two stretched exponential functions is necessary. The results prove the existence of at least two defect levels in the energetic band gap.
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页数：3
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