钛离子辐照对MgB2超导薄膜的载流能力和磁通钉扎能力的影响

王银博; 薛驰; 冯庆荣

doi:10.7498/aps.61.197401

摘要

利用混合物理化学气相沉积法(hybrid physical-chemical vapor deposition, HPCVD)可以制备出高性能的MgB2超导薄膜, 再对薄膜进行钛(Ti)离子辐照处理.经过辐照处理后的样品被掺入了Ti元素, 与未处理的干净MgB2样品相比,其超导转变温度没有出现大幅度的下降, 而在外加磁场下的临界电流密度得到了明显的提高,同时样品的上临界磁场也得到了提高. 在温度5 K, 外加垂直磁场为4 T的情况下, Ti离子辐照剂量为1 1013/cm2的样品的临界电流密度达到了1.72 105 A/cm2, 比干净的MgB2要高出许多,而其超导转变温度仍能维持在39.9 K的较高水平.

关键词:

Abstract

High-quality MgB2 films are fabricated via hybrid physical-chemical vapor deposition (HPCVD) and irradiated by Ti ions. Compared with the unirradiated film, the Ti-irradiated MgB2 film shows a high critical current density (Jc) in magnetic field and also a high upper critical field (Hc2), while the superconducting transition temperature (Tc) does not decrease significantly. The Ti-irradiated film with a best fluence at 1 1013/cm2 shows a high Jc of 1.72 105 A/cm2 in 4 T perpendicular field at a temperature of 5 K and a moderately decreased Tc at 39.9 K.

Keywords:

MgB2 thin films /
Ti ion-irradiation /
hybrid physical-chemical vapor deposition /

作者及机构信息

1.
北京大学物理学院,北京大学人工微结构与介观国家重点实验室,北京大学应用超导研究中心, 100871

基金项目: 国家重点基础研究发展计划(批准号:2006CD601004, 2011CB605904, 2011CBA00104)和国家基础科学人才培养基金(批准号: J0630311)资助的课题．

Authors and contacts

1.
Application Superconductivity Research Center, State Key Laboratory for Artificial Microstructures and Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, China

Funds: Project supported by the Key Development Program for Basic Research of China (Grant Nos. 2006CD601004, 2011CB605904, 2011CBA00104), and the National Foundation Talent in Basic Science Research of China (Grant No. J0630311).

参考文献

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施引文献

[1]	Nagamatsu J, Nakagawa N, Muranaka T, Zentani Y, Akimitsu J 2001 Nature 410 63
[2]	Iwasa Y, Larbalestier D C, Okada M, Penco R, Sumption M D, Xi X X 2006 IEEE Trans. Appl. Supercond. 16 1457
[3]	Larbalestier D C, Cooley L D, Rikel M O, Polyanskii A A, Jiang J, Patnaik S, Cai X Y, Feldmann D M, Gurevich A, Squitieri A A, Naus M T, Eom C B, Hellstrom E E, Cava R J, Regan K A, Rogado N, Hayward M A, He T, Slusky J S, Khalifah P, Inumaru K,Haas M K 2001 Nature 410 186
[4]	Eom C B, Lee M K, Chol J H, Belenky L J, Song X, Cooley L D, Naus M T, Patnaik S, Jiang J, Rikel M, Polyanskii A, A Gurevich, Cai X Y, Bu S D, Babcock S E, Hellstrom E E, Larbalestier D C, Rogado N, Regan K A, Hayward M A, He T, Slusky J S, Inumaru K, Haas M K, Cava R J 2002 Nature 411 558
[5]	Bhatia M, Sumption M D, Coolings E W 2005 IEEE Transactions on Applied Superconductivity 15 3204
[6]	Kim J H, Dou S X, Hossain M S A, Xu X, Wang J L, Shi D Q, Nakane T, Kumakura H 2007 Supercond. Sci. Technol. 20 715
[7]	Krutzler C, Zchetmayer M, Eisterer M, Weber H W, Zhigadlo N D, Karpinski J 2007 Physical Review B 75 224510
[8]	Kumar R, Agrawal H, Kushwaha R, Kanjilal D 2007 Nucl. Instr. and Meth. in Phys. Res. B 263 414
[9]	Soltanian S, Horvat J,Wang X L, Munroe P, Dou S X 2003 Physica C 390 185
[10]	Zhuang C G, Meng S, Yang H, Jia Y, Wen H H, Xi X X, Feng Q R, Gan Z Z 2008 Supercond. Sci. Technol. 21 082002
[11]	Kazakov S M, Puzniak R, Rogacki K, Mironov A V, Zhigadlo N D, Jun J, Soltmann C, Batlogg B, Karpinski J 2005 Physical Review B 71 024533
[12]	Zhao Y, Ionescu M, Horvat J, Li A H, Dou S X 2004 Supercond. Sci. Technol. 17 1247
[13]	Kusevic I, Babic E, Husnjak E, Saltanian S, Wang X L, Dou S X 2004 Solid State Communications 132 761
[14]	Zhang C Y, Wang Y B, Hu W W, Feng Q R 2010 Supercond. Sci. Technol. 23 065017
[15]	Haigh S, Kovac P, Prikhna T A, Savchuk Y M, Kilburn M R, Salter C, Hutchison J, Grovenor C 2005 Supercond. Sci. Technol. 18 1190
[16]	Zhao Y, Feng Y, Shen T M, Li G, Yang Y, Cheng C H 2006 Journal of Applied Physics 100 123902
[17]	Fu B Q, Feng Y, Yan G, Zhao Y, Pradhan A K, Cheng C H, Ji P, Liu X H,. Liu C F, Zhou L, Yau K F 2002 Journal of Applied Physics 92 7341
[18]	Yang Y, Zhao D, Shen T M, Li G, Zhang Y, Feng Y, Chen C H, Zhang Y P, Zhao Y 2008 Physica C 468 1202
[19]	Anderson Jr. N E, Straszheim W E, Budko S L, Canfield P C, Finnemore D K, Suplinskas R J 2003 Physica C 390 11
[20]	Zeng X H. Pogrebnyakov A J, Kotcharov A, Jones J E, Xi X X, Lysczek E M, Redwing J M, Xu S Y, Li Q, Lettieri J, Schlom D G, Tia W, Pan X Q, Liu Z K 2002 Nat. Mater. 1 1
[21]	Xi X X, Pogrebnyakov A V, Xu S Y, Chen K, Cui Y, Maertz E C, Zhuang C G, Li Q, Lamborn D R, Redwing J M, Liu Z K, Soukiassian A, Schlom D G, Weng X J, Dickey E C, Chen Y B, Tian W, Pan X Q, Cybart S A, Dynes R C 2007 Physica C 456 22
[22]	Ribeiro R A, Bud S L,Petrovic C, Canfield P C 2003 Physica C 384 227
[23]	Zao Y, Feng Y, Huang D X, Machi T, Cheng C H, Nakao K, Chikumoto N, Fudamoto Y, Koshozuka N, Murakami M 2002 Physica C 378-381 122
[24]	Fu B Q, Feng Y, Yan G, Zhao Y, Pradhan A K, Cheng C H, Ji P, Liu X H, Liu C F, Zhou L, Yau K F 2002 Journal of Applied Physics 93 7341
[25]	Cheng C H, Zao Y, Feng Y, Zhu X T, Koshozuka N, Murakami M 2003 Supercond. Sci. Technol. 16 125
[26]	Zao Y, Cheng C H, Machi T, Koshozuka N, Murakami M 2002 Appl. Phys. Lett. 80 2311
[27]	Tinkham M 1996 Introduction to Superconductivity (2nd Ed.) (New York: McGraw- Hill) p123
[28]	Bean C P 1962Phys. Rev. Lett.8 250
[29]	Dew-Hughes D 1974 Phil. Mag. 30 293
[30]	Dew-Hughes D 1987 Phil. Mag. 55 459
[31]	Kramer E J 1973 J. Appl. Phys. 44 1360
[32]	Chen J, Ferrando V, Orgiani P, Pogrebnyakov A V, Wilke R, Betts J, Mielke C, Redwing J, Xi X X, Li Q 2006 Phys. Rev. B 74 174511

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