Vortex avalanches and magnetic flux fragmentation in superconductors

被引:69
作者
Aranson, I
Gurevich, A
Vinokur, V
机构
[1] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA
[2] Univ Wisconsin, Ctr Appl Superconduct, Madison, WI 53706 USA
关键词
D O I
10.1103/PhysRevLett.87.067003
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We report the results of numerical simulations of nonisothermal dendritic flux penetration in type-II superconductors. We propose a generic mechanism of dynamic branching of a propagating hot spot of a flux flow/normal state triggered by a local heat pulse. The branching occurs when the flux hot spot reflects from inhomogeneities or the boundary on which magnetization currents either vanish, or change direction. The hot spot then undergoes a cascade of successive splittings, giving rise to a dissipative dendritic-type flux structure. This dynamic state eventually cools down, turning into a frozen multifilamentary pattern of magnetization currents.
引用
收藏
页码:670031 / 670034
页数:4
相关论文
共 26 条
[1]   Continuum field description of crack propagation [J].
Aranson, IS ;
Kalatsky, VA ;
Vinokur, VM .
PHYSICAL REVIEW LETTERS, 2000, 85 (01) :118-121
[2]   FLUX CREEP IN TYPE-2 SUPERCONDUCTORS [J].
BEASLEY, MR ;
LABUSCH, R ;
WEBB, WW .
PHYSICAL REVIEW, 1969, 181 (02) :682-&
[3]   Cooperative self-organization of microorganisms [J].
Ben-Jacob, E ;
Cohen, I ;
Levine, H .
ADVANCES IN PHYSICS, 2000, 49 (04) :395-554
[4]   VORTICES IN HIGH-TEMPERATURE SUPERCONDUCTORS [J].
BLATTER, G ;
FEIGELMAN, MV ;
GESHKENBEIN, VB ;
LARKIN, AI ;
VINOKUR, VM .
REVIEWS OF MODERN PHYSICS, 1994, 66 (04) :1125-1388
[5]   Magnetic instability in YBa2Cu3O7-δ films [J].
Bolz, U ;
Eisenmenger, J ;
Schiessling, J ;
Runge, BU ;
Leiderer, P .
PHYSICA B, 2000, 284 :757-758
[6]   THE FLUX-LINE-LATTICE IN SUPERCONDUCTORS [J].
BRANDT, EH .
REPORTS ON PROGRESS IN PHYSICS, 1995, 58 (11) :1465-1594
[7]   TYPE-II-SUPERCONDUCTOR STRIP WITH CURRENT IN A PERPENDICULAR MAGNETIC-FIELD [J].
BRANDT, EH ;
INDENBOM, M .
PHYSICAL REVIEW B, 1993, 48 (17) :12893-12906
[8]  
CAMPBELL AM, 1972, ADV PHYS, V21, P1191
[9]   OBSERVATION OF MAGNETIC-FIELD PENETRATION VIA DENDRITIC GROWTH IN SUPERCONDUCTING NIOBIUM FILMS [J].
DURAN, CA ;
GAMMEL, PL ;
MILLER, RE ;
BISHOP, DJ .
PHYSICAL REVIEW B, 1995, 52 (01) :75-78
[10]   Nonlinear current flow around defects in superconductors [J].
Gurevich, A ;
McDonald, J .
PHYSICAL REVIEW LETTERS, 1998, 81 (12) :2546-2549