The transverse laser induced thermoelectric voltages in step flow growth (1-x)Pb(Mg1/3Nb2/3)O3–xPbTiO3 thin films
Shang Jie(尚杰)a), Zhang Hui(张辉)a), Li Yong(李勇)a), Cao Ming-Gang(曹明刚)a), and Zhang Peng-Xiang(张鹏翔)a)b)†
a Institute of Advanced Materials for Photoelectronics, Kunming University of Science and Technology, Kunming 650051, China; b MPI, FKF, Stuttgart D-70569, Germany
Abstract This paper reports that the transverse laser induced thermoelectric voltages (LITV) are observed for the first time in the step flow growth (1-x)Pb(Mg1/3Nb2/3)O3–xPbTiO3 (PMN–PT, x=0.20, 0.33, 0.50) thin films deposited on vicinal-cut strontium titanate single crystal substrates. Because lead magnesium niobate-lead titanate is a solid solution of lead magnesium niobate (PMN) and lead titanate (PT), there are two types of signals. One is wide with a time response of a microsecond, and the other superimposed with the wide signal is narrow with a time response of a nanosecond. The transverse LITV signals depend on the ratio of PMN to PT drastically. Under the irradiation of 28-ns pulsed KrF excimer laser with the 248-nm wavelength，the largest induced voltage is observed in the 0.50Pb(Mg1/3Nb2/3)O3–0.50 PbTiO3 films. Moreover, the effects of film thickness, substrates, and tilt angles of substrates are also investigated.
Fund: Project supported by the National Natural Science Foundation of China (Grant No. 10274026).
Cite this article:
Shang Jie(尚杰), Zhang Hui(张辉), Li Yong(李勇), Cao Ming-Gang(曹明刚), and Zhang Peng-Xiang(张鹏翔) The transverse laser induced thermoelectric voltages in step flow growth (1-x)Pb(Mg1/3Nb2/3)O3–xPbTiO3 thin films 2010 Chin. Phys. B 19 107203
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