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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.
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关键词:
- MgB2超导薄膜 /
- 钛离子辐照 /
- 钛掺杂 /
- 混合物理化学气相沉积法
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.[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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[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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