中国物理B ›› 2010, Vol. 19 ›› Issue (10): 107203-107203.doi: 10.1088/1674-1056/19/10/107203
尚杰1, 张辉1, 李勇1, 曹明刚1, 张鹏翔2
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)†
摘要: 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.
中图分类号: (Laser applications)