LIMM: A technique for determination of the spatial distribution of the spontaneous polarization in ferroelectric thin films
作者:
SidneyB. Lang,
期刊:
Integrated Ferroelectrics
(Taylor Available online 1999)
卷期:
Volume 27,
issue 1-4
页码: 119-126
ISSN:1058-4587
年代: 1999
DOI:10.1080/10584589908228461
出版商: Taylor & Francis Group
关键词: LIMM;polarization;fatigue;neural networks;FERAM
数据来源: Taylor
摘要:
The Laser Intensity Modulation Method (LIMM) is used to determine the spatial distribution of polarization in the direction of the polar axis of a ferroelectric sample. It is based upon measurement of the pyroelectric current generated by the material when it is heated with a laser beam which is intensity-modulated over a range of frequencies. A modification of this technique has been developed which will permit detailed profiling of the polarization distribution in a thin-film electroded ferroelectric layer on a substrate, such as a ferroelectric memory. The theory of the technique is discussed and it is shown that the determination of the polarization distributions requires the solution of a Fredholm integral equation of the 1st kind using experimental data. A novel method of solution of this problem using neural networks is described.
点击下载:
PDF (345KB)
返 回