Superconducting Properties of Y(Ba1-xCax)2Cu3O7-δ (0 ≤ x ≤ 0.05) System

被引:0
作者
Shaaidi, W. N. A. W. [1 ]
Lim, K. P. [1 ]
Matori, K. A. [1 ]
Saion, E. [1 ]
Halim, S. A. [1 ]
Chen, S. K. [1 ]
机构
[1] Univ Putra Malaysia, Dept Phys, Fac Sci, Serdang 43400, Malaysia
来源
MALAYSIA ANNUAL PHYSICS CONFERENCE 2010 (PERFIK-2010) | 2011年 / 1328卷
关键词
YBCO; superconducting transition temperature; orthorhombicity; grain growth; GRAIN-BOUNDARIES; CA; YBA2CU3O7-DELTA; CALCIUM;
D O I
10.1063/1.3573747
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
A series of polycrystalline compounds with a nominal composition of Y(Ba(1-x)Ca(x))(2)Cu(3)O(7-delta) (0 <= x <= 0.05) had been synthesized using solid state reaction method. Crystal structure of those samples was characterized by Rietveld refinement on the x-ray powder diffraction data. It was found that the structural parameters were not changed appreciably with Ca content in Y(Ba(1-x)Ca(x))(2)Cu(3)O(7-delta). While c-axis remained almost unchanged, both a and b axes decreased slightly leading to the decrease in orthorhombicity of Y-123 phase. The superconducting transition temperature, T(c) was determined by measuring the change of electrical resistance versus temperature (50 K - 300 K) using a four point probe technique. The T(c) was observed to decrease gradually by Ca doping from 91 K for x=0.00 to 88 K for x=0.05 attributable to oxygen vacancy disorder. In addition, the superconducting transition breadth, Delta T, increased with Ca doping because of degraded crystallinity or inhomogeneity of the samples. Finally, scanning electron micrographs indicated grain growth induced by Ca doping.
引用
收藏
页码:257 / 260
页数:4
相关论文
共 10 条
[1]   STRUCTURAL ANOMALIES, OXYGEN ORDERING AND SUPERCONDUCTIVITY IN OXYGEN DEFICIENT BA2YCU3OX [J].
CAVA, RJ ;
HEWAT, AW ;
HEWAT, EA ;
BATLOGG, B ;
MAREZIO, M ;
RABE, KM ;
KRAJEWSKI, JJ ;
PECK, WF ;
RUPP, LW .
PHYSICA C, 1990, 165 (5-6) :419-433
[2]   Improved strong magnetic field performance of low angle grain boundaries of calcium and oxygen overdoped YBa2Cu3Ox [J].
Daniels, GA ;
Gurevich, A ;
Larbalestier, DC .
APPLIED PHYSICS LETTERS, 2000, 77 (20) :3251-3253
[3]   Effect of Ca doping for Y on structural/microstructural and superconducting properties of YBa2Cu3O7-δ [J].
Giri, R ;
Awana, VPS ;
Singh, HK ;
Tiwari, RS ;
Srivastava, ON ;
Gupta, A ;
Kumaraswamy, BV ;
Kishan, H .
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2005, 419 (3-4) :101-108
[4]   Enhanced supercurrent density in polycrystalline YBa2Cu3O7-δ at 77 K from calcium doping of grain boundaries [J].
Hammerl, G ;
Schmehl, A ;
Schulz, RR ;
Goetz, B ;
Bielefeldt, H ;
Schneider, CW ;
Hilgenkamp, H ;
Mannhart, J .
NATURE, 2000, 407 (6801) :162-164
[5]   INFLUENCE OF CA ON THE SUPERCONDUCTIVITY OF Y1-XCAXBA2CU3O7-DELTA [J].
MANTHIRAM, A ;
LEE, SJ ;
GOODENOUGH, JB .
JOURNAL OF SOLID STATE CHEMISTRY, 1988, 73 (01) :278-282
[6]   New investigation for Tc depression by Ca in Y1-xCax:123 superconducting systems [J].
Sedky, A. ;
Abu-Ziad, Bander .
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2010, 470 (17-18) :659-668
[7]   Chain-oxygen ordering in twin-free YBa2Cu3O7-δ single crystals driven by 20-keV electron irradiation -: art. no. 052501 [J].
Seo, HW ;
Chen, QY ;
Iliev, MN ;
Johansen, TH ;
Kolev, N ;
Welp, U ;
Wang, C ;
Chu, WK .
PHYSICAL REVIEW B, 2005, 72 (05)
[8]   Electromagnetic, atomic structure and chemistry changes induced by Ca-doping of low-angle YBa2Cu3O7-δ grain boundaries [J].
Song, XY ;
Daniels, G ;
Feldmann, DM ;
Gurevich, A ;
Larbalestier, D .
NATURE MATERIALS, 2005, 4 (06) :470-475
[9]   Ca-doping-induced enhancement of the critical currents of coated conductors grown by ion-beam-assisted deposition [J].
Weber, A ;
Hammerl, G ;
Schmehl, A ;
Schneider, CW ;
Mannhart, J ;
Schey, B ;
Kuhn, M ;
Nies, R ;
Utz, B ;
Neumueller, HW .
APPLIED PHYSICS LETTERS, 2003, 82 (05) :772-774
[10]   X-ray diffraction studies on YBa2Cu3O7-delta with Co substitution [J].
Wu, XS ;
Jiang, SS ;
Lam, CC ;
Wang, DW ;
Huang, XR ;
Wu, ZH ;
Xuan, Y ;
Jin, X .
PHYSICA STATUS SOLIDI A-APPLIED RESEARCH, 1996, 157 (02) :439-447