TRANSPORT ENTROPY IN YBA2CU3O7 - A COMPARISON BETWEEN EPITAXIAL AND POLYCRYSTALLINE THIN-FILMS

被引：33

作者：

KOBER, F ^{[1
]}

RI, HC ^{[1
]}

GROSS, R ^{[1
]}

KOELLE, D ^{[1
]}

HUEBENER, RP ^{[1
]}

GUPTA, A ^{[1
]}

机构：

[1] IBM CORP, THOMAS J WATSON RES CTR, DIV RES, YORKTOWN HTS, NY 10598 USA

来源：

PHYSICAL REVIEW B | 1991年 / 44卷 / 21期

关键词：

D O I：

10.1103/PhysRevB.44.11951

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The dissipative behavior in thin films of YBa2Cu3O7-delta has been investigated under the influence of a temperature gradient. By using the sample configuration itself as a thermometer, a method has been developed for the study of flux dynamics in the presence of a temperature gradient. The temperature and magnetic-field dependence of the transport entropy was measured, and the influence of grain boundaries on this quantity was investigated. For an epitaxial YBa2Cu3O7-delta film near T(c), we obtain the value -dH(c2)/dT = 2 +/- 0.5 T/K and the Ginzburg-Landau parameter kappa(GL) = 80 +/-10.

引用

页码：11951 / 11959

页数：9

共 29 条

[1] PREPARATION OF Y-BA-CU OXIDE SUPERCONDUCTOR THIN-FILMS USING PULSED LASER EVAPORATION FROM HIGH-TC BULK MATERIAL [J].

DIJKKAMP, D ;

VENKATESAN, T ;

WU, XD ;

SHAHEEN, SA ;

JISRAWI, N ;

MINLEE, YH ;

MCLEAN, WL ;

CROFT, M .

APPLIED PHYSICS LETTERS, 1987, 51 (08) :619-621

[2] THEORY OF COLLECTIVE FLUX CREEP [J].

FEIGELMAN, MV ;

GESHKENBEIN, VB ;

LARKIN, AI ;

VINOKUR, VM .

PHYSICAL REVIEW LETTERS, 1989, 63 (20) :2303-2306

[3] VORTEX-GLASS SUPERCONDUCTIVITY - A POSSIBLE NEW PHASE IN BULK HIGH-TC OXIDES [J].

FISHER, MPA .

PHYSICAL REVIEW LETTERS, 1989, 62 (12) :1415-1418

[4] UNUSUAL SEEBECK AND NERNST EFFECTS IN THE MIXED STATE OF BI2-XPBXSR2CA2CU3O-DELTA [J].

GALFFY, M ;

FREIMUTH, A ;

MUREK, U .

PHYSICAL REVIEW B, 1990, 41 (16) :11029-11032

[5] RESISTIVE BEHAVIOR OF HIGH-TC SUPERCONDUCTORS - INFLUENCE OF A DISTRIBUTION OF ACTIVATION-ENERGIES [J].

GRIESSEN, R .

PHYSICAL REVIEW LETTERS, 1990, 64 (14) :1674-1677

[6] FLUX-FLOW NERNST EFFECT IN EPITAXIAL YBA2CU3O7 [J].

HAGEN, SJ ;

LOBB, CJ ;

GREENE, RL ;

FORRESTER, MG ;

TALVACCHIO, J .

PHYSICAL REVIEW B, 1990, 42 (10) :6777-6780

[7] MODEL FOR THE REVERSIBLE MAGNETIZATION OF HIGH-KAPPA TYPE-II SUPERCONDUCTORS - APPLICATION TO HIGH-TC SUPERCONDUCTORS [J].

HAO, ZD ;

CLEM, JR ;

MCELFRESH, MW ;

CIVALE, L ;

MALOZEMOFF, AP ;

HOLTZBERG, F .

PHYSICAL REVIEW B, 1991, 43 (04) :2844-2852

[8] HEAT-CURRENT OPERATOR AND TRANSPORT ENTROPY OF VORTICES IN TYPE-2 SUPERCONDUCTORS [J].

HU, CR .

PHYSICAL REVIEW B, 1976, 13 (11) :4780-4783

[9]

Huebener R. P., 1979, MAGNETIC FLUX STRUCT

[10] 2-DIMENSIONAL VORTEX FLUCTUATIONS IN THE NONLINEAR CURRENT-VOLTAGE CHARACTERISTICS FOR HIGH-TEMPERATURE SUPERCONDUCTORS [J].

JENSEN, HJ ;

MINNHAGEN, P .

PHYSICAL REVIEW LETTERS, 1991, 66 (12) :1630-1633

← 1 2 3 →