The origin of the weak ferroelectric-like hysteresis effect in paraelectric Ba<sub>0.5</sub>Sr<sub>0.5</sub>TiO<sub>3</sub>thin films grown epitaxially on LaAlO<sub>3</sub>Xiaohong Zhu, Dongyao Zheng, Haiyan Tian et al.|Journal of Physics Condensed Matter|2006Cited by 22