Determination of the material parameters of a melt-textured YBCO superconductor by DC magnetization analysis

被引：5

作者：

Çelebi, S ^{[1
]}

Öztürk, A ^{[1
]}

Yanmaz, E ^{[1
]}

Kopya, AI ^{[1
]}

机构：

[1] Karadeniz Tech Univ, Fac Sci & Arts, Dept Phys, TR-61080 Trabzon, Turkey

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2000年 / 298卷 / 1-2期

关键词：

high-Tc superconductor; YBCO; critical state model; critical current density; Meissner current;

D O I：

10.1016/S0925-8388(99)00644-1

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We report the isothermal magnetization cut-yes of a YBCO superconducting sample prepared by a flame-quench-melt-growth (FQMG) method. Hysteresis loops have been calculated and analyzed in the framework of a critical state model including the Meissner current. The bulk critical current and Meissner current as a function of applied field were extracted, and the volume fraction of the grains, f(g), has been estimated to be 0.64 from a comparison of the theoretical and experimental M-H hysteresis loops. The lower critical field, mu(0)H(c1), was found to be 14.4 mT. (C) 2000 Elsevier Science S.A. All rights reserved.

引用

页码：285 / 290

页数：6

共 21 条

[1] Thermally activated flux dissipation in Ag-added YBa2Cu3O7-x(123) prepared by flame-quench-melt-growth (FQMG) method [J].

Ates, A ;

Yanmaz, E ;

Celebi, S .

JOURNAL OF ALLOYS AND COMPOUNDS, 1998, 268 (1-2) :215-220

[2] SURFACE BARRIER IN TYPE-2 SUPERCONDUCTORS [J].

BEAN, CP ;

LIVINGSTON, JD .

PHYSICAL REVIEW LETTERS, 1964, 12 (01) :14-&

[3] MAGNETIZATION OF HIGH-FIELD SUPERCONDUCTORS [J].

BEAN, CP .

REVIEWS OF MODERN PHYSICS, 1964, 36 (1P1) :31-+

[4] Magnetic responses of a high-Tc semi-reversible YBCO superconductor [J].

Çelebi, S ;

Öztürk, A ;

Çevik, U .

JOURNAL OF ALLOYS AND COMPOUNDS, 1999, 288 (1-2) :249-254

[5] FLUX-TRAPPING PHENOMENA IN SINTERED TUBES OF HIGH-TC SUPERCONDUCTORS [J].

CELEBI, S ;

LEBLANC, MAR .

PHYSICAL REVIEW B, 1994, 49 (22) :16009-16024

[6] MAGNETIC-PROPERTIES OF HIGH-T(C) SUPERCONDUCTING GRAINS [J].

CHEN, DX ;

SANCHEZ, A .

PHYSICAL REVIEW B, 1992, 45 (18) :10793-10796

[7] KIM MODEL FOR MAGNETIZATION OF TYPE-II SUPERCONDUCTORS [J].

CHEN, DX ;

GOLDFARB, RB .

JOURNAL OF APPLIED PHYSICS, 1989, 66 (06) :2489-2500

[8] THEORY OF AC LOSSES IN TYPE-II SUPERCONDUCTORS WITH A FIELD-DEPENDENT SURFACE-BARRIER [J].

CLEM, JR .

JOURNAL OF APPLIED PHYSICS, 1979, 50 (05) :3518-3530

[9]

FIETZ WA, 1964, PHYS REV, V136, pA355

[10]

GREEN IM, 1967, P I ELECTR ENG, V114, P1326

← 1 2 3 →