Modulation of persistent photoconductivity by electric-field-controlled strain in thin films of La0.39Pr0.24Ca0.37MnO3
Modulation of persistent photoconductivity by electric-field-controlled strain in thin films of La0.39Pr0.24Ca0.37MnO3
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DOI：
10.1063/1.4793534
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发表时间：
2013-02-18
影响因子：
4
通讯作者：
Gao, J.
中科院分区：
文献类型：
--
作者：
Wang, J. F.;Jiang, Y. C.;Gao, J.
在0.7PbMg(1/3)Nb(2/3)O(3)-0.3PbTiO(3) （PMN-PT）衬底上外延生长出La0.39Pr0.24Ca0.37MnO3 （LPCMO）薄膜。这些LPCMO薄膜在532 nm的可见光照射下表现出低温持久光电导率（PPC）。PMN-PT上的电场不仅可以调制电阻，还可以调制PPC。详细分析和原位x射线衍射表明，这种调制主要是由于外加电场通过逆压电效应改变了晶格变形。光和应变以不同的方式影响相竞争。(C) 2013年美国物理研究所。[http://dx.doi.org/10.1063/1.4793534]
Thin films of La0.39Pr0.24Ca0.37MnO3 (LPCMO) were epitaxially grown on 0.7PbMg(1/3)Nb(2/3)O(3)-0.3PbTiO(3) (PMN-PT) substrates. These LPCMO films exhibited low-temperature persistent photoconductivity (PPC) when illuminated by a visible light of 532 nm. Not only the resistance but also PPC were modulated by electric fields across PMN-PT. Detailed analysis and in situ x-ray diffraction indicate that such modulations were mainly due to the change of lattice deformation by applied electric fields via converse piezoelectric effect. It was also found that light and strain influence the phase competition in different ways. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4793534]