Reversible mechanism of magnetothermal instabilities in melt-textured YBaCuO

被引：7

作者：

Chabanenko, VV ^{[1
]}

Dyachenko, AI ^{[1
]}

Szymczak, H ^{[1
]}

Piechota, S ^{[1
]}

机构：

[1] POLISH ACAD SCI,INST PHYS,PL-02668 WARSAW,POLAND

来源：

PHYSICA C | 1996年 / 273卷 / 1-2期

关键词：

grain alignment (textured); flux pinning; flux instability; twin boundaries; plastic deformation; YBa2Cu3O7-x;

D O I：

10.1016/S0921-4534(96)00621-1

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The anisotropy of the development of instabilities in the melt-textured YBaCuO samples with remanent magnetization of 600 emu/g has been studied in a magnetic field up to 12 T. Large 500 emu/g jumps of the magnetic moment of the sample due to the development of the magnetothermal instability have been observed. A giant (10(-4)) magnetostriction caused by the magnetic flux pinning has been revealed. Stabilization of the critical state of the sample by reversal of magnetization has been found. However, when the sample is heated to temperatures higher than 100 K and subsequently cooled the magnetic jumps restore completely. A new reversible mechanism of instability generation based on the phenomenon reversibility of plastic deformations of high-temperature superconductors (HTS) is proposed to explain the regeneration of critical state instability.

引用

页码：127 / 134

页数：8

共 21 条

[1]

BOIKO VS, 1989, FIZ NIZK TEMP+, V15, P988

[2]

BOIKO VS, 1994, REVERSIBLE PLASTICIT

[3]

CHABANENKO VV, 1994, LOW TEMP PHYS, V20, P929

[4]

DOROSINSKII LA, 1991, PISMA ESKP TEOR FIZ, V49, P1260

[5] FLUX INSTABILITIES IN HARD SUPERCONDUCTORS [J].

EVETTS, JE ;

DEWHUGHES, D ;

CAMPBELL, AM .

PHILOSOPHICAL MAGAZINE, 1964, 10 (104) :339-+

[6] MAGNETIC INSTABILITIES IN HIGH-TEMPERATURE SUPERCONDUCTORS [J].

GERBER, A ;

TARNAWSKI, Z ;

FRANSE, JJM .

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 1993, 209 (1-3) :147-150

[7] STABILITY AGAINST FLUX JUMPING IN SINTERED NB3SN [J].

HANCOX, R .

PHYSICS LETTERS, 1965, 16 (03) :208-&

[8] FERROELASTIC DOMAIN SWITCHING IN YBA2CU3OX SINGLE-CRYSTALS BY EXTERNAL STRESS [J].

HATANAKA, T ;

SAWADA, A .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS, 1989, 28 (05) :L794-L796

[9]

Huimin S., 1987, J PHYS C SOLID STATE, V20, pL889

[10] GIANT MAGNETOSTRICTION IN BI2SR2CACU2O8 SINGLE-CRYSTAL IN THE SUPERCONDUCTING STATE AND ITS MECHANISM [J].

IKUTA, H ;

HIROTA, N ;

NAKAYAMA, Y ;

KISHIO, K ;

KITAZAWA, K .

PHYSICAL REVIEW LETTERS, 1993, 70 (14) :2166-2169

← 1 2 3 →