1. [1] N. Nishimoto, T. Yamamae, T. Kaku, Y. Matsuo, K. Senthilkumar, O. Senthilkumar, J. Okamoto, Y. Yamada, S. Kubo, and Y. Fujita, J. Cryst. Growth 310, 5003 (2008).
2. [2] N. Nishimoto, Y. Matsuo, and Y. Fujita, Phys. Status Solidi C 7, 1542 (2010).
3. [3] R. Ohno, M. Tongu, H. Hashimoto, Y. Fujita, and J. Fujihara, 7th International Symposium on Nanomedicine, Kitakyushu, Japan, 2013.
4. [4] T. Tanigaki, S. Kimura, N. Tamura, and C. Kaito, Jpn. J. Appl. Phys. 41, 5529 (2002).
5. [5] M. Vafaee and M. Sasani Ghamsari, Mater. Lett. 61, 3265 (2007).