Volume 97, Number 4, February 2012
|Number of page(s)||6|
|Section||Condensed Matter: Structural, Mechanical and Thermal Properties|
|Published online||20 February 2012|
Nano-domain orientation modulation of photoresponse based on anisotropic transport in manganite films
State Key Laboratory of Heavy Oil Processing, China University of Petroleum - Beijing 102249, PRC
2 College of Science, China University of Petroleum - Beijing 102249, PRC
3 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences Beijing 100190, China
4 Department of Physics, The Chinese University of Hong Kong - Hong Kong, China
5 International Center for Materials Physics, Chinese Academy of Sciences - Shenyang 110016, China
Accepted: 20 January 2012
Anisotropic carrier transports have been observed in La0.67Ca0.33MnO3 and La0.4Ca0.6MnO3 films grown on miscut MgO (001) substrates under pulsed-laser irradiations without external bias. We discussed the mechanism of the transport process under ultrafast laser irradiation in tilted manganite films. A model of anisotropic diffusion in transient photoresponse is presented. From the microstructure of La0.4Ca0.6MnO3 and its photoresponse property in different directions, we can see that the nanometer size domain orientation can modulate the photoresponse signals, indicating a new-type nanometer scale photosensitive source.
PACS: 68.37.-d – Microscopy of surfaces, interfaces, and thin films / 68.55.-a – Thin film structure and morphology / 78.67.-n – Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures
© EPLA, 2012
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