7Fleshier S, Buczek D, Carter B, Cedrone P, DeMoranville K, Gannon J, Inch J, Li X, Lynch J, Otto A, Podtburg E, Roy D, Rupich M, Sathyamurthy S, Schreiber J, Thieme C, Thompson E, Tucker D, Nagashima K, Ogata M .2009 Physica C 469 1316.
8Shi D Q, Ma P, Ko R K, Kim H S, Chung J K, Song K J, Park C .2007 Chin. Phys. B 16 2142.
9Ding F Z, Gu H W, Zhang T, Dai S T, Xiao L Y .2011 Chin. Phys. B 20 027402.
10Goyal A, Norton D P, Budai J D, Paranthaman M, Specht E D, Kroeger D M, Christen D K, He Q, Saffian B, List F A, Lee D F, Martin P M, Klabunde C E, Hartfield E, Sikka V K .1996 Appl. Phys. Lett. 69 795.