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Chemical Synthesis and Characterization of Superconducting YBa2Cu4O8at Ambient Pressure. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.199400103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Watanabe N, Kosuge M, Koshizuka N, Adachi S, Yamauchi H. Phonon Raman scattering of polycrystalline YBa2Cu4O8 under hydrostatic pressure. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:9226-9229. [PMID: 10009713 DOI: 10.1103/physrevb.49.9226] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Watanabe N, Adachi S, Tajima S, Yamauchi H, Koshizuka N. Phonon Raman scattering in polycrystalline Y1-xPrxBa2Cu4O8. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:4180-4183. [PMID: 10008880 DOI: 10.1103/physrevb.48.4180] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Singh BP, Pandey SP, Nayar RK, Kumaraswamy BV, Narlikar AV. Unstable behavior of the YBa2Cu4O8 superconductor under pressure. PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 46:3573-3580. [PMID: 10004075 DOI: 10.1103/physrevb.46.3573] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Chapter 5: The Specific Heat of High-TC Superconductors. ACTA ACUST UNITED AC 1992. [DOI: 10.1016/s0079-6417(08)60054-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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High resolution electron microscopy study of defects in “high oxygen pressure” YBa2Cu4O8. J SOLID STATE CHEM 1991. [DOI: 10.1016/0022-4596(91)90305-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Hawley M, Raistrick ID, Beery JG, Houlton RJ. Growth Mechanism of Sputtered Films of YBa
2
Cu
3
O
7
Studied by Scanning Tunneling Microscopy. Science 1991; 251:1587-9. [PMID: 17793141 DOI: 10.1126/science.251.5001.1587] [Citation(s) in RCA: 406] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
The surface microstructures of c-axis-oriented films of YBa(2)Cu(3)O(7), deposited by off-axis magnetron sputtering on MgO and SrTiO(3) single crystal (100) substrates, have been investigated with scanning tunneling microscopy and atomic force microscopy. There is strong evidence that the films nucleate as islands and grow by adding material to the edge of a spirally rising step. This results in columnar grains, each of which contains a screw dislocation at its center. This microstructure may be of significance in determining superconducting properties such as critical current, and represents a significant difference between thin films (especially those grown in situ) and bulk materials.
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Liu Y, Lee JY, Sumner MJ, Sooryakumar R, Lemberger TR. Raman-scattering study of high-Tc films of the ordered defect structure YBa2Cu4O8- delta. PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 42:10090-10097. [PMID: 9995264 DOI: 10.1103/physrevb.42.10090] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Wada T, Sakurai T, Suzuki N, Koriyama S, Yamauchi H, Tanaka S. Preparation and properties of superconducting Y(Ba1-xSrx)2Cu4O8. PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 41:11209-11213. [PMID: 9993541 DOI: 10.1103/physrevb.41.11209] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Itti R, Miyatake T, Ikeda K, Yamaguchi K, Koshizuka N, Tanaka S. Photoelectron spectroscopic study of (Y1-xCax)Ba2Cu4Oy: Observation of the Fermi-edge-like structure at room temperature. PHYSICAL REVIEW. B, CONDENSED MATTER 1990; 41:9559-9562. [PMID: 9993315 DOI: 10.1103/physrevb.41.9559] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Budhani RC, Welch DO, Suenaga M, Sabatini RL. Field-induced broadening of the resistive transition and two-dimensional nature of flux pinning in Y2Ba4Cu8O16 films. PHYSICAL REVIEW LETTERS 1990; 64:1666-1669. [PMID: 10041456 DOI: 10.1103/physrevlett.64.1666] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Ramesh R, Hwang DM, Venkatesan T, Ravi TS, Nazar L, Inam A, Wu XD, Dutta B, Thomas G, Marshall AF, Geballe TH. Direct Observation of Structural Defects in Laser-Deposited Superconducting Y-Ba-Cu-O Thin Films. Science 1990; 247:57-9. [PMID: 17749491 DOI: 10.1126/science.247.4938.57] [Citation(s) in RCA: 65] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
The defect structure of in situ pulsed, laser-deposited, thin films of the high-transition temperature superconductor Y-Ba-Cu-O has been observed directly by atomic resolution electron microscopy. In a thin film with the nominal composition YBa(2)Cu(3)O(7) (123), stacking defects corresponding to the cationic stoichiometry of the 248, 247, and 224 compounds have been observed. Other defects observed include edge dislocations and antiphase boundaries. These defects, which are related to the nonequilibrium processing conditions, are likely to be responsible for the higher critical currents observed in these films as compared to single crystals.
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Triscone J, Karkut MG, Antognazza L, Brunner O, Fischer O. Y-Ba-Cu-O/Dy-Ba-Cu-O superlattices: A first step towards the artificial construction of high-Tc superconductors. PHYSICAL REVIEW LETTERS 1989; 63:1016-1019. [PMID: 10041247 DOI: 10.1103/physrevlett.63.1016] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Laderman SS, Char K, Lee M, Hahn MR, Hammond RH, Beasley MR, Geballe TH, Kapitulnik A, Barton R. Orthorhombic distortion and cation ordering in Y2Ba4Cu8O16 and Er2Ba4Cu8O16 high-Tc thin films. PHYSICAL REVIEW. B, CONDENSED MATTER 1989; 39:11648-11652. [PMID: 9947996 DOI: 10.1103/physrevb.39.11648] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Marwick AD, Clark GJ, Yee DS, Laibowitz RB, Coleman G, Cuomo JJ. Resistivity changes and defect mobility in ion-irradiated YBa2Cu3O7-x. PHYSICAL REVIEW. B, CONDENSED MATTER 1989; 39:9061-9068. [PMID: 9947632 DOI: 10.1103/physrevb.39.9061] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Martin S, Gurvitch M, Rice CE, Hebard AF, Gammel PL, Fleming RM, Fiory AT. Nonlinear temperature dependence of the normal-state resistivity in YBa2Cu4O8+/- delta films. PHYSICAL REVIEW. B, CONDENSED MATTER 1989; 39:9611-9613. [PMID: 9947705 DOI: 10.1103/physrevb.39.9611] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Morris DE, Nickel JH, Wei JY, Asmar NG, Scott JS, Scheven UM, Hultgren CT, Markelz AG, Post JE, Heaney PJ, Veblen DR, Hazen RM. Eight new high-temperature superconductors with the 1:2:4 structure. PHYSICAL REVIEW. B, CONDENSED MATTER 1989; 39:7347-7350. [PMID: 9947406 DOI: 10.1103/physrevb.39.7347] [Citation(s) in RCA: 93] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Abstract
Spectacular advances in superconductors have taken place in the past two years. The upper temperature for superconductivity has risen from 23 K to 122 K, and there is reason to believe that the ascent is still ongoing. The materials causing this excitement are oxides. Those oxides that superconduct at the highest temperatures contain copper-oxygen sheets; however, other elements such as bismuth and thallium play a key role in this new class of superconductors. These superconductors are attracting attention because of the possibility of a wide range of applications and because the science is fascinating. A material that passes an electrical current with virtually no loss is more remarkable when this occurs at 120 K instead of 20 K.
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Mandich ML, DeSantolo AM, Fleming RM, Marsh P, Nakahara S, Sunshine S, Kwo J, Hong M, Boone T, Kometani TY, Martinez-Miranda L. Superconducting properties of a 27-A. PHYSICAL REVIEW. B, CONDENSED MATTER 1988; 38:5031-5034. [PMID: 9946908 DOI: 10.1103/physrevb.38.5031] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Char K, Lee M, Barton RW, Marshall AF, Bozovic I, Hammond RH, Beasley MR, Geballe TH, Kapitulnik A, Laderman SS. Properties of Y-Ba-Cu-O thin films with ordered defect structure: Y2Ba4Cu8O20-x. PHYSICAL REVIEW. B, CONDENSED MATTER 1988; 38:834-837. [PMID: 9945271 DOI: 10.1103/physrevb.38.834] [Citation(s) in RCA: 60] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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