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Transient photocurrents in lead zirconate titanate thin films

 

作者: A. Kholkin,   O. Boiarkine,   N. Setter,  

 

期刊: Applied Physics Letters  (AIP Available online 1998)
卷期: Volume 72, issue 1  

页码: 130-132

 

ISSN:0003-6951

 

年代: 1998

 

DOI:10.1063/1.120663

 

出版商: AIP

 

数据来源: AIP

 

摘要:

Transient photocurrents are investigated in ferroelectric lead zirconate titanate (PZT) films illuminated by laser pulses in the spectral range of 340–380 nm. At low electric fields, the photocurrent is sensitive to the ferroelectric polarization state and changes sign upon the polarization switching. At higher fields, the polarization-independent current proportional to the applied electric field is dominant. The spectral dependence of polarization-dependent current is controlled by the excitation of charge carriers over the forbidden band of PZT having a maximum near 3.5 eV. Possible mechanisms of the observed effect are discussed and the possibilities of a nondestructive read out of polarization state in the ultraviolet spectral range are demonstrated. ©1998 American Institute of Physics.

 

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