Field-induced pinning effect of Nd(Ba1-xNdx)(2)Cu3O7-delta single crystal grown by the traveling-solvent floating-zone method

被引：30

作者：

Egi, T

Wen, JG

Kuroda, K

Mori, H

Unoki, H

Koshizuka, N

机构：

[1] Super. Conduct. Research Laboratory, Intl. Super. Conduct. Technol. Ctr., Tokyo, 135, 10-13 Shinonome 1-chome, Koto-ku

来源：

PHYSICA C | 1996年 / 270卷 / 3-4期

关键词：

NdBa2Cu3O7-delta single crystal; peak effect; pinning center; high critical current density; substitution;

D O I：

10.1016/S0921-4534(96)00483-2

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have studied the superconducting properties of Nd(Ba1-xNdx)(2)Cu3O7-delta (Nd123, x approximate to 0.1) single crystals grown by the traveling-solvent floating-zone method under 0.1% O-2 in Ar atmosphere. The enhancement of the magnetization with increasing field is observed in the hysteresis (M-H) loop in fields both parallel and perpendicular to the c-axis of the Nd123 single crystals as well as in the bulk crystals prepared by the oxygen-controlled-melt-growth (OCMG) method. The composition variation of Ba/Nd is observed in the matrix of Nd123 crystals by an analytical TEM equipped with a cold field-emission gun. It turns out that the enhancement is due to the field-induced pinning effect ascribed to the weak superconducting Nd-Ba substitution regions in the Nd123 matrix.

引用

页码：223 / 230

页数：8

共 26 条

[1] Influence of planar macrodefects on the anisotropy of magnetic-flux penetration in YBa2Cu3O7-delta [J].

Cuche, E ;

Indenbom, MV ;

Andre, MO ;

Richard, P ;

Benoit, W ;

Wolf, T .

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 1996, 256 (3-4) :324-330

[2] OXYGEN-DEFECT FLUX PINNING, ANOMALOUS MAGNETIZATION AND INTRAGRAIN GRANULARITY IN YBA2CU3O7-DELTA [J].

DAEUMLING, M ;

SEUNTJENS, JM ;

LARBALESTIER, DC .

NATURE, 1990, 346 (6282) :332-335

[3] HIGH CRITICAL-CURRENT DENSITY OF ND(BA,ND)(2)CU3O7-DELTA SINGLE-CRYSTALS [J].

EGI, T ;

WEN, JG ;

KURODA, K ;

UNOKI, H ;

KOSHIZUKA, N .

APPLIED PHYSICS LETTERS, 1995, 67 (16) :2406-2408

[4]

EGI T, 1995, P 8 INT S SUP 30 OCT

[5]

Fujimoto H., 1990, Advances in Superconductivity II. Proceedings of the 2nd International Symposium on Superconductivity (ISS '89), P285

[6] DIRECT OBSERVATION OF FLUX BEHAVIOR IN HIGH-TC OXIDE SUPERCONDUCTORS USING THE FARADAY-EFFECT OF IRON-GARNET FILMS [J].

GOTOH, S ;

KOSHIZUKA, N ;

YOSHIDA, M ;

MURAKAMI, M ;

TANAKA, S .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS, 1990, 29 (07) :L1083-L1085

[7] ANISOTROPIC CRITICAL CURRENTS IN BA2YCU3O7 ANALYZED USING AN EXTENDED BEAN MODEL [J].

GYORGY, EM ;

VANDOVER, RB ;

JACKSON, KA ;

SCHNEEMEYER, LF ;

WASZCZAK, JV .

APPLIED PHYSICS LETTERS, 1989, 55 (03) :283-285

[8]

HIGUCHI T, 95 INT WORKSH SUP 18

[9]

KOBLISCHKA M, IN PRESS PHYS REV B

[10] MAGNETOOPTICAL INVESTIGATIONS OF SUPERCONDUCTORS [J].

KOBLISCHKA, MR ;

WIJNGAARDEN, RJ .

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 1995, 8 (04) :199-213

← 1 2 3 →