[1] S. Kim, V. Gopalan, and A. Gruverman, Appl. Phys. Lett. 80, 2740 (2002).

[2] D. A. Scrymgeour, V. Gopalan, A. Itagi, A. Saxena, and P. J. Swart, Phys. Rev. B 71, 184110 (2005).

[3] A. K. Bandyopadhyay and P. C. Ray, J. Appl. Phys. 95, 226 (2004).

[4] A. Bandyopadhyay, A. Sengupta, K. Choudhary, A. K. Bandyopadhyay, and P. C. Ray, World J. Condensed Matter Phys. 2, 91 (2012).

[5] Bas B. Van Aken, J. Rivera, H. Schmid, and M. Fiebig, Nature 449, 702 (2007).

[6] Y. Zhang, F. Wang, K. Geren, S. N. Zhu, and M. Xiao, Opt. Lett. 35, 178 (2010).

[7] S. MacCormack and J. Feinberg, Appl. Opt. 35, 5961 (1996).

[8] V. Grubsky, S. MacCormack, and J. Feinberg, Opt. Lett. 21, 6 (1996).

[9] M. Muller, C. Langrock, E. Soergel, K. Buse, and M. M. Fejer, J. Appl. Phys. 97, 044102 (2005).

[10] Y. L. Chen, W. G. Yan, D. D. Wang, S. L. Chen, and G. Y. Zhang, Appl. Phys. Lett. 90, 062908 (2007).

[11] R. Brooks, P. D. Townsend, D. E. Hole, D. Callejo, V. Bermudez, and E. Dieguez, J. Phys. D: Appl. Phys. 36, 969 (2003).

[12] B. Vohnsen and B. I. Bozhevolnyi, J. Microscopy 202, 244 (2001).

[13] A. Fragemann, V. Pasiskevicius, and F. Laurell, Appl. Phys. Lett. 85, 375 (2004).

[14] M. Florsheimer, R. Paschotta, U. Kubitscheck, Ch. Brillert, D. Hofmann, L. Heuer, G. Schrei-ber, C. Verbeek, W. Sohler, and H. Fuchs, Appl. Phys. B 67, 59 (1998).

[15] T. J. Yang, U. Mohiaeen, and M. C. Gupta, Appl. Phys. Lett. 71, 1960 (1997).

[16] E. K. H. Salje and Y. Ishibashi, J. Phys. Condens. Matter 8, 8477 (1996).