Vortex dynamics below the flux-lattice melting transition inYBa2Cu3O7−δ

1995 ◽  
Vol 52 (9) ◽  
pp. 6211-6214 ◽  
Author(s):  
H. Safar ◽  
P. L. Gammel ◽  
D. A. Huse ◽  
G. B. Alers ◽  
D. J. Bishop ◽  
...  
Keyword(s):  
Vortex Dynamics ◽  
Melting Transition ◽  
Flux Lattice

STUDY ON VORTEX DYNAMICS OF Tl2Ba2CaCu2O10 THIN FILM IN TILTED MAGNETIC FIELDS

2005 ◽  
Vol 19 (01n03) ◽  
pp. 459-461
Author(s):  
GUOHUA ZHANG ◽  
SHENG LUO ◽  
CHUNGUANG LI ◽  
SAIJUN HUANG ◽  
YUSHENG HE ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Vortex Dynamics ◽  
Lattice Structure ◽  
Melting Transition ◽  
Perpendicular Line ◽  
Resistivity Measurements ◽  
Vortex Phase ◽  
Transition Resistance ◽  
Resistance Criterion ◽  
Lock In

Tl 2 Ba 2 CaCu 2 O 10 ( Tl :2212) thin films were prepared on LaAlO 3 substrates with (0 0 1) direction normal to their surface, and the logR-logH characteristics were measured using the in-plane resistivity measurements in magnetic fields tilted away from c axis to the ab-plane. The H *c- H ab phase diagram was obtained by defining a resistance criterion below the vortex phase melting transition resistance. The linear dependence of H *c on H ab in most angular range shows that the crossing-lattice structure in the tilted fields exists in Tl :2212. A perpendicular line was observed in the H *c- H ab diagram at the range of θ ¡ 0.4 ° at 88K, which was attributed to the lock-in transition.

scholarly journals Anomalous sliding friction and peak effect near the flux lattice melting transition

2000 ◽  
Vol 62 (17) ◽  
pp. 11834-11837 ◽  
Author(s):  
E. Granato ◽  
T. Ala-Nissila ◽  
S. C. Ying
Keyword(s):  
Sliding Friction ◽  
Peak Effect ◽  
Melting Transition ◽  
Flux Lattice

Considerations Limiting Zero-Resistance Currents in High-Temperature Superconductors

1989 ◽  
Vol 169 ◽  
Author(s):  
M. Tinkham
Keyword(s):  
High Temperature ◽  
High Temperature Superconductors ◽  
Melting Transition ◽  
Thermally Activated ◽  
Flux Motion ◽  
Flux Lattice ◽  
Zero Resistance

AbstractThe fundamental processes governing the appearance of dissipation due to flux motion in superconductors are reviewed. The dominant thermally‐activated resistive processes are discussed, and evidence for a sharp melting transition of the flux lattice is assessed.

Vortex Dynamics and Dissipation in High Temperature Superconductors — from DC to Microwave Frequencies

1992 ◽  
Vol 275 ◽  
Author(s):  
N.-C. Yeh ◽  
W. Jiang ◽  
D. S. Reed ◽  
U. Kriplani ◽  
F. Holtzberg ◽  
...  
Keyword(s):  
High Temperature ◽  
Vortex Dynamics ◽  
Electrical Transport ◽  
High Frequency ◽  
High Temperature Superconductors ◽  
Epitaxial Films ◽  
Melting Transition ◽  
Frequency Limit ◽  
Current Frequency ◽  
Microwave Frequencies

ABSTRACTA second-order vortex-solid melting transition in twinned Y-Ba-Cu-O single crystals is manifested by two independent types of electrical transport measurements: the electric field (E) versus current density (J) isotherms, and the ac resistivity (ρ) vs current frequency (ω) isotherms. Universal static and dynamic exponents (ν ≈ 2/3 and Ζ ≈ 3, respectively) are found for magnetic fields ranging from 1 to 90 kOe, frequencies ranging from 0 to 2 MHz, magnetic directions parallel and perpendicular to the crystal c-axis, as well as samples with and without proton irradiations. At microwave frequencies, we find that the vortex dissipation in Nd-Ce-Cu-O epitaxial films is consistent with the viscous motion of individual vortices, due to the break down of the critical scaling theory in the high frequency limit.

Critical Scaling of LöW Frequency Ac Resistivity in Superconducting Y-Ba-Cu-O Single Crystals

1992 ◽  
Vol 275 ◽  
Author(s):  
D. S. Reed ◽  
N. -C. Yeh ◽  
W. Jiang ◽  
U. Kriplanp ◽  
F. Holtzberg
Keyword(s):  
Magnetic Fields ◽  
Single Crystal ◽  
Single Crystals ◽  
Vortex Dynamics ◽  
Strong Evidence ◽  
Critical Exponents ◽  
Low Frequency ◽  
Melting Transition ◽  
Universal Functions ◽  
Transport Measurements

ABSTRACTAC transport measurements show that the vortex dynamics in a twinned superconducting Y-Ba-Cu-O single crystal are consistant with a second order vortex-solid melting transition. Indentification of the universal functions and consistent measurements of the critical exponents v = 0.7 and z= 3.0 found in magnetic fields from IkOe to 90kOe as well as DC transport measurements offer strong evidence for this transition.

Flux Lattice Melting and Dimensional Crossover in Bi-2212 Single Crystals

1996 ◽  
Vol 6 (12) ◽  
pp. 2327-2354 ◽  
Author(s):  
P. H. Kes ◽  
H. Pastoriza ◽  
T. W. Li ◽  
R. Cubitt ◽  
E. M. Forgan ◽  
...  
Keyword(s):  
Single Crystals ◽  
Dimensional Crossover ◽  
Flux Lattice
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