The transverse laser induced thermoelectric voltages in step flow growth (1- x)PD(Mg1/3Nb2/3)O3-xPbTiO3 thin films |
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作者姓名: | Shang Jie Zhang Hui Li Yong Cao Ming-Gang Zhang Peng-Xiang |
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作者单位: | [1]Institute of Advanced Materials for Photoelectronics, Kunming University of Science and Technology, Kunming 650051, China [2]MPI, FKF, Stuttgart D-70569, Germany |
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基金项目: | Project supported by the National Natural Science Foundation of China (Grant No. 10274026). |
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摘 要: | This paper reports that the transverse laser induced thermoelectric voltages (LITV) axe observed for the first time in the step flow growth (1- x)PD(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.
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关 键 词: | PbTiO3薄膜 感应电压 激光感生 帕金森病 台阶流 热电 钛酸铅薄膜 中性粒细胞 |
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