Relaxation of the remanent resistance of granular HTSC Y-Ba-Cu-O plus CuO composites after magnetic field treatment

被引：13

作者：

Balaev, D. A. ^{[1
]}

Dubrovskii, A. A. ^{[1
]}

Popkov, S. I. ^{[1
]}

Shaikhutdinov, K. A. ^{[1
]}

Petrov, M. I. ^{[1
]}

机构：

[1] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia

来源：

PHYSICS OF THE SOLID STATE | 2008年 / 50卷 / 06期

关键词：

D O I：

10.1134/S1063783408060036

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The hysteresis of magnetoresistance R(H) and relaxation of the remanent resistance R-rem with time after magnetic field treatment of HTSC (Y-Ba-Cu-O) + CuO composites are studied. Such a composite constitutes a network of Josephson junctions wherein the nonsuperconducting component (CuO) forms Josephson barriers between HTSC grains. By comparing the experimental R-rem(t) and R(H) dependences, it is shown that the relaxation of the remanent resistance is caused by the decreased magnetic field in the intergrain medium due to relaxation of magnetization. The reason is uncovered for the differences between the published values of pinning potentials determined by measuring the relaxation of magnetization or resistance and fitting them by the Anderson law.

引用

页码：1014 / 1021

页数：8

共 24 条

[1] FLUX TRAPPING IN TRANSPORT MEASUREMENTS OF YBA2CU3O7-X SUPERCONDUCTORS - A FINGERPRINT OF INTRAGRAIN PROPERTIES [J].

ALTSHULER, E ;

GARCIA, S ;

BARROSO, J .

PHYSICA C, 1991, 177 (1-3) :61-66

[2] THEORY OF FLUX CREEP IN HARD SUPERCONDUCTORS [J].

ANDERSON, PW .

PHYSICAL REVIEW LETTERS, 1962, 9 (07) :309-&

[3]

Balaev A. D., 1985, Prib. Tekh. Eksp., P167

[4] Study of dependence upon the magnetic field and transport current of the magnetoresistive effect in YBCO-based bulk composites [J].

Balaev, D. A. ;

Prus, A. G. ;

Shaykhutdinov, K. A. ;

Gokhfeld, D. M. ;

Petrov, M. I. .

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2007, 20 (06) :495-499

[5] Mechanisms of dissipation in a Josephson medium based on a high-temperature superconductor in a magnetic field [J].

Balaev, D. A. ;

Popkov, S. I. ;

Shaikhutdinov, K. A. ;

Petrov, M. I. .

PHYSICS OF THE SOLID STATE, 2006, 48 (05) :826-832

[6] Magnetoresistive effect in bulk composites 1-2-3 YBCO+CuO and 1-2-3 YBCO+BaPb1-xSnxO3 and their application as magnetic field sensors at 77 K [J].

Balaev, DA ;

Shaihutdinov, KA ;

Popkov, SI ;

Gokhfeld, DM ;

Petrov, MI .

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 2004, 17 (01) :175-181

[7] SURFACE-BARRIER AND LOWER CRITICAL-FIELD IN YBA2CU3O7-DELTA SUPERCONDUCTORS [J].

CHEN, DX ;

GOLDFARB, RB ;

CROSS, RW ;

SANCHEZ, A .

PHYSICAL REVIEW B, 1993, 48 (09) :6426-6430

[8]

Daghero D., 2002, PHYS REV B, V66, P11478

[9] Effect of an external magnetic field and a trapped magnetic flux on the current-voltage characteristics of a granular high-temperature superconductor YBa2Cu3O7-δ [J].

Derevyanko, V. V. ;

Sukhareva, T. V. ;

Finkel', V. A. .

PHYSICS OF THE SOLID STATE, 2006, 48 (08) :1455-1460

[10] Penetration of a magnetic field into the YBa2Cu3O7-δ high-temperature superconductor:: Magnetoresistance in weak magnetic fields [J].

Derevyanko, VV ;

Sukhareva, TV ;

Finkel', VA .

PHYSICS OF THE SOLID STATE, 2004, 46 (10) :1798-1804

← 1 2 3 →