scholarly journals Vortex pinning and irreversibility fields in FeS1–xSex (x = 0, 0.06)

2017 ◽  
Vol 110 (23) ◽  
pp. 232601 ◽  
Author(s):  
Aifeng Wang ◽  
C. Petrovic
Keyword(s):  
Vortex Pinning ◽  
Irreversibility Fields

scholarly journals Enhanced 77 K vortex-pinning in Y Ba2Cu3O7−x films with Ba2Y TaO6 and mixed Ba2Y TaO6 + Ba2Y NbO6 nano-columnar inclusions with irreversibility field to 11 T

APL Materials ◽  
2016 ◽  
Vol 4 (6) ◽  
pp. 061101 ◽  
Author(s):  
F. Rizzo ◽  
A. Augieri ◽  
A. Angrisani Armenio ◽  
V. Galluzzi ◽  
A. Mancini ◽  
...  
Keyword(s):  
Vortex Pinning ◽  
Irreversibility Field

Structure and Functional Properties of Bulk MgB2 Superconductors Synthesized and Sintered under Pressure

2014 ◽  
Vol 792 ◽  
pp. 21-26 ◽  
Author(s):  
Tatiana Prikhna ◽  
Michael Eisterer ◽  
Wolfgang Gawalek ◽  
Athanasios G. Mamalis ◽  
Artem Kozyrev ◽  
...  
Keyword(s):  
Critical Current ◽  
Material Structure ◽  
Bulk Materials ◽  
Critical Fields ◽  
Current Densities ◽  
Upper Critical Fields ◽  
Irreversibility Fields ◽  
Grain Boundary Pinning ◽  
Effect Of Oxygen ◽  
Oxygen Impurities

The high pressure (50 MPa - 2 GPa) – high temperature synthesized MgB2 bulk materials are characterized by nearly theoretical density (1-2% porosity), 80-98% connectivity, extremely high critical current densities (e.g. at 20 K, in 0–1 T jc=1.3–1.0 MA·cm-2 (with 10% SiC) and jc= 0.92 – 0.73 MA·cm-2 (without doping)), large irreversibility fields (Birr(18.4 K) =15 T and Birr (0 K) = 32.5 T) and high upper critical fields (Bc2 (22 K) =15 T and Bc2(0 K) ~ 42.1 T). The transformation of grain boundary pinning to point pinning in MgB2-based materials with increasing manufacturing temperature (from 800 to 1050 oC) under pressures from 0.1 to 2 GPa correlates well with an increase in critical current density in low external magnetic fields caused by the redistribution of boron and the oxygen impurities in the material structure. As the manufacturing temperature increases, the discontinuous oxygen enriched layers transform into distinct Mg-B-O inclusions and the size and amount of inclusions of higher magnesium borides MgBX (X>4) are reduced. The effect of oxygen and boron redistribution can be enhanced by Ti or SiC additions.

Suppression of vortex pinning by field component parallel to the superconducting plane inBi2Sr2CaCu2O8

2000 ◽  
Vol 61 (5) ◽  
pp. 3270-3273 ◽  
Author(s):  
S. Nakaharai ◽  
T. Ishiguro ◽  
S. Watauchi ◽  
J. Shimoyama ◽  
K. Kishio
Keyword(s):  
Field Component ◽  
Vortex Pinning ◽  
Component Parallel

Vortex Pinning and Dynamics in HTS films: Role of Extended Linear Defects

2011 ◽  
Vol 1367 ◽  
Author(s):  
Alexander L. Kasatkin ◽  
Constantin G. Tretiatchenko ◽  
Volodymyr M. Pan
Keyword(s):  
Lorentz Force ◽  
Classical Mechanics ◽  
Vortex Pinning ◽  
Dislocation Model ◽  
Linear Defect ◽  
Single Vortex ◽  
Linear Defects ◽  
Anisotropic Superconductor ◽  
Hts Films

ABSTRACTThe model of single vortex escape from extended linear defect and subsequent vortex dynamics under the Lorentz force action in a rather thick (d > 2λ) 3D anisotropic superconductor is developed. We consider the case of parallel c-oriented linear defects as well as the case of equidistant linear row of such kind of defects, which represents the dislocation model of low-angle [001] tilt grain boundary in HTS films and bicrystals. The suggested model based on the classical mechanics approach allows to describe behavior of an elastic vortex string in the potential well of linear defect and under the action of Lorentz force on its end within the Meissner current carrying layer and to determine the depinning critical current density at low magnetic fields and temperatures.

Three-dimensional vortex pinning by nano-precipitates in a Sm-doped YBa2Cu3O7−xcoated conductor

2007 ◽  
Vol 20 (9) ◽  
pp. S205-S210 ◽  
Author(s):  
Z Chen ◽  
D M Feldmann ◽  
X Song ◽  
S I Kim ◽  
A Gurevich ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Vortex Pinning

scholarly journals Directional Vortex Pinning at Microwave Frequency in YBa2Cu3O7−x Thin Films with BaZrO3 Nanorods

2012 ◽  
Vol 26 (5) ◽  
pp. 2093-2097 ◽  
Author(s):  
N. Pompeo ◽  
K. Torokhtii ◽  
A. Augieri ◽  
G. Celentano ◽  
V. Galluzzi ◽  
...  
Keyword(s):  
Thin Films ◽  
Microwave Frequency ◽  
Vortex Pinning
Sign in / Sign up

Export Citation Format

Share Document