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We fabricate Bi2Sr2Co2Oy films on c-Al2O3 by pulsed laser deposition and investigate the effects of substrate temperature and oxygen pressure on the crystal stucture and the transport properties of the films. The resulting single phase c-axis Bi2Sr2Co2Oy films obtained under the optimal condition have a room temperature resistivity of about 2.9 m/cm and a seebeck coefficient of 110 V/K, leading to a larger power factor than that of the single crystal. In addition, a negative magnetroresistance of 40% at 2K and 9T is observed in the films.
[1] Zhang F, Zhu H T, Luo J, Liang J K, Rao G H, Liu Q L 2010 Acta Phys. Sin. 59 7232 (in Chinese) [张帆, 朱航天, 骆军, 梁敬魁, 饶光辉, 刘泉林 2010 59 7232]
[2] [3] Liu H J, Yan Y G, Tang X F, Yin L L, Zhang Q J 2007 Acta Phys. Sin. 56 7309 (in Chinese) [刘海君, 鄢永高, 唐新峰, 尹玲玲, 张清杰 2007 56 7309]
[4] Terasaki I Sasago Y, Uchinokura K 1997 Phys. Rev. B 56 R12685
[5] [6] [7] Schaak R E, Klimczuk T, Foo M L, Cava R J 2003 Nature 424 527
[8] Nagao Y, Terasaki I 2007 Phys. Rev. B 76 144203
[9] [10] [11] Funahashi R, Shikano M 2000 Appl. Phys. Lett. 81 1459
[12] Kang J S, Han S W, Fujii T, Terasaki I, Lee S S, Kim G, Olson C G, Lee H G, Kim J Y, Min B I 2006 Phys. Rev. B 74 205116
[13] [14] Klein Y, Pelloquin D, Hebert S, Maignan A 2005 J. Appl. Phys. 98 013701
[15] [16] [17] Funahashi R, Matsubara I, Sodeoka S 2000 Appl. Phys. Lett. 762385
[18] [19] Wang S F, Venimadhav A, Guo S M, Chen K, Li Q, Soukiassian A, Schlom D G, Katz M B, Pan X Q, Wong-Ng W, Vaudin M D, Xi X X 2009 Appl. Phys. Lett. 94 022110
[20] Wang S F, Zhang Z C, He L P, Chen M J 2009 Appl. Phys. Lett. 94 022110
[21] [22] Itoh T, Terasaki I 2000 Jpn. J. Appl. Phys. 39 6658
[23] [24] [25] Hebert S, Lambert S, Pelloquin D, Maignan A 2001 Phys. Rev. B 64172101
[26] Koumoto K, Terasaki I, Funahashi R 2006 MRS Bulletin 31 206
[27] [28] Yamamoto T, Uchinokura K, Tsukada I 2002 Phys. Rev. B 65 184434
[29] [30] Maignan A, Hebert S, Hervieu M, Michel C, Pelloquin D, Khom-skii D 2003 J. Phys.: Condens. Matter 15 2711
[31] [32] Masset A C, Michel C, Maignan A, Hervieu M, Toulemonde O, Studer F, Raveau B 2000 Phys. Rev. B 62 166
[33] [34] Luo X G, Chen X H, Wang G Y, Wang C H, Xiong Y M 2006 Eur.Phys. J. B 49 37
[35] -
[1] Zhang F, Zhu H T, Luo J, Liang J K, Rao G H, Liu Q L 2010 Acta Phys. Sin. 59 7232 (in Chinese) [张帆, 朱航天, 骆军, 梁敬魁, 饶光辉, 刘泉林 2010 59 7232]
[2] [3] Liu H J, Yan Y G, Tang X F, Yin L L, Zhang Q J 2007 Acta Phys. Sin. 56 7309 (in Chinese) [刘海君, 鄢永高, 唐新峰, 尹玲玲, 张清杰 2007 56 7309]
[4] Terasaki I Sasago Y, Uchinokura K 1997 Phys. Rev. B 56 R12685
[5] [6] [7] Schaak R E, Klimczuk T, Foo M L, Cava R J 2003 Nature 424 527
[8] Nagao Y, Terasaki I 2007 Phys. Rev. B 76 144203
[9] [10] [11] Funahashi R, Shikano M 2000 Appl. Phys. Lett. 81 1459
[12] Kang J S, Han S W, Fujii T, Terasaki I, Lee S S, Kim G, Olson C G, Lee H G, Kim J Y, Min B I 2006 Phys. Rev. B 74 205116
[13] [14] Klein Y, Pelloquin D, Hebert S, Maignan A 2005 J. Appl. Phys. 98 013701
[15] [16] [17] Funahashi R, Matsubara I, Sodeoka S 2000 Appl. Phys. Lett. 762385
[18] [19] Wang S F, Venimadhav A, Guo S M, Chen K, Li Q, Soukiassian A, Schlom D G, Katz M B, Pan X Q, Wong-Ng W, Vaudin M D, Xi X X 2009 Appl. Phys. Lett. 94 022110
[20] Wang S F, Zhang Z C, He L P, Chen M J 2009 Appl. Phys. Lett. 94 022110
[21] [22] Itoh T, Terasaki I 2000 Jpn. J. Appl. Phys. 39 6658
[23] [24] [25] Hebert S, Lambert S, Pelloquin D, Maignan A 2001 Phys. Rev. B 64172101
[26] Koumoto K, Terasaki I, Funahashi R 2006 MRS Bulletin 31 206
[27] [28] Yamamoto T, Uchinokura K, Tsukada I 2002 Phys. Rev. B 65 184434
[29] [30] Maignan A, Hebert S, Hervieu M, Michel C, Pelloquin D, Khom-skii D 2003 J. Phys.: Condens. Matter 15 2711
[31] [32] Masset A C, Michel C, Maignan A, Hervieu M, Toulemonde O, Studer F, Raveau B 2000 Phys. Rev. B 62 166
[33] [34] Luo X G, Chen X H, Wang G Y, Wang C H, Xiong Y M 2006 Eur.Phys. J. B 49 37
[35]
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