[1] Wang J, Neaton J B, Zheng H, Nagarajan V, Ogale S B, Liu B, Viehland D, Vaithyanathan V, Schlom D G, Waghamare U V, Spaldine N A, Rabe K M, Wattig M, Ramesh R 2003 Science 299 1719
[2] Hill N A 2000 J. Phys. Chem. B 104 6694
[3] Ramesh R, Spaldin N A 2007 Nature Mater. 6 21
[4] Wang K F, Liu J M, Ren Z F 2009 Adv. Phys. 58 321
[5] Dong X W, Wang K F, Wan J G, Zhu J S, Liu J M 2008 J. Appl. Phys. 103 094101
[6] Mao X Y, Wang W, Chen X B, Lu Y L 2009 Appl. Phys. Lett. 95 082901
[7] Snedden A, Hervoches C H, Lightfoot P 2003 Phys. Rve. B 67 092102
[8] Yuan B, Yang J, Song D P, Zuo X Z, Tang X W, Zhu X B, Dai J M, Song W H, Sun Y P 2015 J. Appl. Phys. 117 023907
[9] Patwe S J, Achary S N, Manjanna J, Tyagi A K, Deshpande S K, Mishra S K, Krishna P S R, ShindeA B 2013 Appl. Phys. Lett. 103 122901
[10] Kubel F, Schmid H 1992 Ferroelectrics 129 101
[11] Fouskova A, Cross L E 1970 J. Appl. Phys. 41 2834
[12] Neaton J B, Ederer C, Waghmare U V, Spaldin N A, Rabe K M 2005 Phys. Rev. B 71 014113
[13] Singh R S, Bhimasankararn T, Kumar G S, Suryanarayana S V 1994 Solid State Commun. 91 567
[14] Mao X Y, Wang W, Chen X B 2008 Solid State Commun. 147 186
[15] Hu X, Wang W, Mao X Y, Chen X B 2010 Acta Phys. Sin. 59 8160 (in Chinese) [胡星, 王伟, 毛翔宇, 陈小兵 2010 物理学报 59 8160]
[16] Yang J, Tong W, Liu Z, Zhu X B, Dai J M, Song W H, 1 Yang Z R, Sun Y P 2012 Phys. Rve. B 86 104410
[17] Yang J, Yin L H, Liu Z, Zhu X B, Song W H, Dai J M, Yang Z R, Sun Y P 2012 Appl. Phys. Lett. 101 012402
[18] Palizdar M, Comyn T P, Ward M B, Brown A P, Harrington J P, Kulkarni S, Keeney L, Roy S, Pemble M, Whatmore R, Quinn C, Kilcoyne S H, Bell A J 2012 J. Appl. Phys. 112 073919
[19] Chen C Y, Hou S, Mao X Y, Chen X B 2013 Mater. Sci. Forum 745 142
[20] Yuan B, Yang J, Chen J, Zuo X Z, Yin L H, Tang X W, Zhu X B, Dai J M, Song W H, Sun Y P 2014 Appl. Phys. Lett. 104 062413
[21] Shannon R D 1976 Acta Crystallogr., Sect. A: Cryst. Phys., Diffr., Theor. Gen. Crystallogr 32 751
[22] Rondinelli J M, Spaldin N A 2009 Phys. Rev. B 79 054409
[23] Song G L, Luo Y P, Su J, Zhou X H, Chang F G 2013 Acta Phys. Sin. 62 097502 (in Chinese) [宋桂林, 罗艳萍, 苏健, 周晓辉, 常方高 2013 物理学报 62 097502]
[24] Cai M Q, Liu J C, Yang G W, Cao Y L, Tan X, Yi X, Wang Y G, Wang L L, Hu W Y 2007 J. Chem. Phys. 126 154708
[25] Zhang H, Liu Y J, Pan L H, Zhang Y 2009 Acta. Phys. Sin. 58 7141 (in Chinese) [张晖, 刘拥军, 潘丽华, 张瑜 2009 物理学报 58 7141]
[26] Sun H, Lu X M, Xu T T, Su J, Jin Y M, Ju C C, Huang F Z, Zhu J S 2012 J. Appl. Phys. 111 124116
[27] Mao X Y, Wei W, Hui S, Lu Y L, Chen X B 2012 J. Mater. Sci. 47 2960
[28] Liu Z, Yang J, Tang X W, Yin L H, Zhu X B, Dai J M, Sun Y P 2012 Appl. Phys. Lett. 101 122402
[29] Li J B, Huang Y P, Rao G H, Liu G Y, Luo J, Chen J R, Liang J K 2010 Appl. Phys. Lett. 96 222903
[30] Shimakawa Y, Kubo Y, Nakagawa Y, Goto S, Kamiyama T, Asano H, Izumi F 2000 Phys. Rev. B 61 6559