Microwave observation of the vortex locked-in state inYBa2Cu3O7thin films with columnar defects

1995 ◽  
Vol 51 (13) ◽  
pp. 8489-8493 ◽  
Author(s):  
S. E. Lofland ◽  
S. M. Bhagat ◽  
M. Rajeswari ◽  
T. Venkatesan ◽  
D. Kanjilal ◽  
...  
Keyword(s):  
Columnar Defects ◽  
Microwave Observation

Summation of Flux Pinning by Columnar Defects Tilted at Different Angles in YBCO Thin Films

2021 ◽  
Vol 31 (5) ◽  
pp. 1-5
Author(s):  
Tetsuro Sueyoshi ◽  
Ryusei Enokihata ◽  
Hiroshi Yamaguchi ◽  
Takanori Fujiyoshi ◽  
Yasuki Okuno ◽  
...  
Keyword(s):  
Thin Films ◽  
Flux Pinning ◽  
Ybco Thin Films ◽  
Columnar Defects

ANISOTROPIC VORTEX DYNAMICS AND PHASE DIAGRAM OF YBa2Cu3O7 SINGLE CRYSTALS WITH CANTED COLUMNAR DEFECTS

1996 ◽  
Vol 10 (22) ◽  
pp. 2723-2743 ◽  
Author(s):  
D. S. REED ◽  
N.-C. YEH ◽  
W. JIANG ◽  
U. KRIPLANI ◽  
M. KONCZYKOWSKI ◽  
...  
Keyword(s):  
Phase Diagram ◽  
Magnetic Fields ◽  
Vortex Dynamics ◽  
Flow Model ◽  
Flux Flow ◽  
Thermally Activated ◽  
Liquid Transition ◽  
Columnar Defects ◽  
Thermally Activated Flux Flow ◽  
Activated Flux

The anisotropic vortex dynamics and phase diagram are determined for a YBa 2 Cu 3 O 7 single crystal with columnar defects oriented at ±7.5° relative to the crystalline c-axis. A second-order splayed-glass to vortex-liquid transition is manifested for magnetic fields nearly parallel to the columns via the critical scaling of vortex AC and DC transport properties. In contrast, for magnetic fields aligned close to the ab-plane, an XY-like vortex-glass transition prevails. For magnetic fields at intermediate angles, there is no evidence of any vortex phase transition, and the vortex dynamics is described in terms of the thermally activated flux flow model.

scholarly journals Shift of the surface-barrier part of the irreversibility line due to columnar defects in Bi2Sr2CaCu2O8 thin films

2004 ◽  
Vol 402 (1-2) ◽  
pp. 114-118 ◽  
Author(s):  
Yu. Talanov ◽  
H. Adrian ◽  
M. Basset ◽  
G. Jakob ◽  
G. Wirth
Keyword(s):  
Thin Films ◽  
Irreversibility Line ◽  
Surface Barrier ◽  
Columnar Defects

FROZEN FLUX SUPERCONDUCTORS

1999 ◽  
Vol 13 (15) ◽  
pp. 491-497 ◽  
Author(s):  
I. F. LYUKSYUTOV ◽  
D. G. NAUGLE
Keyword(s):  
Magnetic Nanoparticles ◽  
Critical Current ◽  
Flux Line ◽  
Magnetic Nanorods ◽  
Novel Materials ◽  
New Class ◽  
Columnar Defects ◽  
Composite Superconductor ◽  
Composite Superconductors ◽  
Line Network

We propose a new class of composite superconductors with embedded magnetic nanoparticles/nanorods. These nanomagnets can create a thermodynamically stable, frozen, dense flux line network. We discuss the methods of fabrication of these novel materials. We show that due to the frozen flux created by magnetic nanorods, the critical current in this composite superconductor can be higher than in the superconductor with a comparable density of columnar defects.

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