EXPERIMENTAL-EVIDENCE OF A CROSSOVER IN THE PINNING OF VORTICES IN UNTWINNED SINGLE-CRYSTALS OF YBA2CU3O7-DELTA

被引：18

作者：

DANNA, G ^{[1
]}

BENOIT, W ^{[1
]}

SADOWSKI, W ^{[1
]}

WALKER, E ^{[1
]}

机构：

[1] UNIV GENEVA,DPMC,CH-1211 GENEVA 4,SWITZERLAND

来源：

EUROPHYSICS LETTERS | 1992年 / 20卷 / 02期

关键词：

D O I：

10.1209/0295-5075/20/2/013

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Using a forced torsion pendulum we have investigated the frequency, amplitude and orientation dependence of the vortex response in untwinned single crystals of YBa2Cu3O7-delta. A new thermally activated dissipation peak which appears at high amplitude, accompanied by a crossover in the pinning, has been observed in addition to the one associated to the controversial vortex melting. The shape and mass anisotropy effects have been investigated.

引用

收藏

页码：167 / 173

页数：7

相关论文

共 18 条

[1] FLUX DYNAMICS IN A SINTERED BULK HIGH-TEMPERATURE SUPERCONDUCTOR [J].

BAAR, DJ ;

HARRISON, JP .

PHYSICA C, 1989, 157 (02) :215-220

[2] ANISOTROPIC SUPERCONDUCTING PROPERTIES OF YBA2CU3O7(0.1) AND YBA2CU3O7(0.4) UNTWINNED SINGLE-CRYSTALS [J].

BAUHOFER, W ;

BIBERACHER, W ;

GEGENHEIMER, B ;

JOSS, W ;

KREMER, RK ;

MATTAUSCH, H ;

MULLER, A ;

SIMON, A .

PHYSICAL REVIEW LETTERS, 1989, 63 (22) :2520-2523

[3] MELTING OF THE ABRIKOSOV FLUX LATTICE IN ANISOTROPIC SUPERCONDUCTORS [J].

BECK, RG ;

FARRELL, DE ;

RICE, JP ;

GINSBERG, DM ;

KOGAN, VG .

PHYSICAL REVIEW LETTERS, 1992, 68 (10) :1594-1596

[4] FROM ISOTROPIC TO ANISOTROPIC SUPERCONDUCTORS - A SCALING APPROACH [J].

BLATTER, G ;

GESHKENBEIN, VB ;

LARKIN, AI .

PHYSICAL REVIEW LETTERS, 1992, 68 (06) :875-878

[5] A SUPERCONDUCTING VIBRATING REED APPLIED TO FLUX-LINE PINNING .1. THEORY [J].

BRANDT, EH ;

ESQUINAZI, P ;

NECKEL, H .

JOURNAL OF LOW TEMPERATURE PHYSICS, 1986, 63 (3-4) :187-214

[6] PENETRATION OF MAGNETIC AC FIELDS INTO TYPE-II SUPERCONDUCTORS [J].

BRANDT, EH .

PHYSICAL REVIEW LETTERS, 1991, 67 (16) :2219-2222

[7] DOUBLE PEAKS IN THE DISSIPATION OF VIBRATING SUPERCONDUCTORS [J].

BRANDT, EH .

PHYSICAL REVIEW LETTERS, 1992, 68 (25) :3769-3772

[8] VORTEX LATTICE STRUCTURES IN UNIAXIAL SUPERCONDUCTORS [J].

CAMPBELL, LJ ;

DORIA, MM ;

KOGAN, VG .

PHYSICAL REVIEW B, 1988, 38 (04) :2439-2443

[9] DYNAMIC AND STATIC MECHANICAL MEASUREMENTS OF FLUX-LATTICE SOFTENING AND ASSOCIATED HYSTERETIC DEPINNING DISSIPATION PEAK IN YBA2CU3OX CERAMIC [J].

DANNA, G ;

BENOIT, W ;

LUZURIAGA, J ;

BERGER, H .

EUROPHYSICS LETTERS, 1990, 13 (05) :465-471

[10] APPARATUS FOR DYNAMIC AND STATIC MEASUREMENTS OF MECHANICAL-PROPERTIES OF SOLIDS AND OF FLUX-LATTICE IN TYPE-II SUPERCONDUCTORS AT LOW-FREQUENCY (10-5-10-HZ) AND TEMPERATURE (4.7-500-K) [J].

DANNA, G ;

BENOIT, W .

REVIEW OF SCIENTIFIC INSTRUMENTS, 1990, 61 (12) :3821-3826