[1] Liu K X, Stahlbush R E, Lew K K, et al. J. Electron Mater, 2008,

     37: 730.

[2] Ryu S H, Kornegay K T. IEEE Trans. Electron Decices, 1998, 45: 45.

[3] Maxinenko S I, Sudarshan T S. J. Appl. Phys., 2005, 97: 074501.

[4] 051912.

     Fujiwara H, Kimoto T, Tojo T, et al. Appl. Phys. Lett., 2005, 87:

[5] Zhang Z, Moulton E, Sudarshan T S. Appl. Phys. Lett., 2006, 89:

     081910.

[6] Camassel J, Juilaguet S. J. Physics D: Applied Physics, 2007, 40

     (20): 6264.

[9] Miyanagi T, Tsuchida H, Kamata I, et al. Appl. Phys. Lett., 2006,

     89: 062104.

[10] 2008, 93: 033514.

     Chen B, Chen J, Sekiguchi T, Ohyanagi T, et al. Appl. Phys. Lett.,

[11] Izumi S, Tsuchida H, Kzmata I, et al. Appl. Phys. Lett., 2005, 86:

     202108.