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中国物理学会期刊

Pb(Zr0.3Ti0.7)O3铁电薄膜激光感生电压效应

CSTR: 32037.14.aps.59.6417

Laser-induced voltage effect in Pb(Zr0.3Ti0.7)O3 ferroelectric thin film

CSTR: 32037.14.aps.59.6417
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  • 采用脉冲激光沉积(PLD)技术在LaSrAlTaO3(LSATO),LaAlO3(LAO)和SrTiO3(STO)的单晶倾斜衬底上成功制备了Pb(Zr0.3Ti0.7)O3(PZT)薄膜,在三种倾斜衬底上生长的PZT薄膜中都首次发现了LIV效应.对PZT/LSATO薄膜在a,c轴两种不同取向择优生长下的LIV效应做了研究,发现在薄膜c轴取向择优生长

     

    Pb(Zr0.3Ti0.7)O3(PZT)thin films have been grown by pulsed laser deposition (PLD) on LaSrAlTaO3 (LSATO),LaAlO3(LAO) and SrTiO3(STO) single crystal vicinal cut substrates. Laser-induced voltage(LIV) effect was also found in PZT thin films grown on the three vicinal cut substrates for the first time. LIV signals increased with the single-pulse laser energy following the linear relation in case of c-axis orientation of thin film; but this linear relation was not followed obviously in case of a-axis orientation of thin film. This result shows that the LIV effect in PZT thin film is the atomic layer thermopile effect, in the which anisotropy of Seebeck coefficient plays an important role. Through realizing impedance-matching of thin films and transmission line, LITV signal response time has been optimized, the time of rising edge dropped from 60 ns to 26 ns, the full width at half maximum dropped from 260 ns to 38 ns.

     

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