Estimation of critical current densities from magnetization measurements in a single crystal of a high-Tcsuperconductor. 1. One-dimensional flux penetration

1992 ◽  
Vol 5 (1S) ◽  
pp. S204-S207 ◽  
Author(s):  
K Yamafuji ◽  
Y Mawatari
Keyword(s):  
Single Crystal ◽  
Critical Current ◽  
Flux Penetration ◽  
Magnetization Measurements ◽  
One Dimensional ◽  
Current Densities

Irreversibility line and critical current densities of ‘1223’ cuprate TlBa2Ca2Cu3O9: a single crystal study

Cryogenics ◽  
1994 ◽  
Vol 34 (11) ◽  
pp. 941-945 ◽  
Author(s):  
A. Wahl ◽  
V. Hardy ◽  
A. Maignan ◽  
C. Martin ◽  
B. Raveau
Keyword(s):  
Single Crystal ◽  
Critical Current ◽  
Irreversibility Line ◽  
Single Crystal Study ◽  
Current Densities

Magneto-optical study of flux penetration and critical current densities in [001] tiltYBa2Cu3O7−δthin-film bicrystals

1996 ◽  
Vol 53 (13) ◽  
pp. 8687-8697 ◽  
Author(s):  
A. A. Polyanskii ◽  
A. Gurevich ◽  
A. E. Pashitski ◽  
N. F. Heinig ◽  
R. D. Redwing ◽  
...  
Keyword(s):  
Critical Current ◽  
Optical Study ◽  
Flux Penetration ◽  
Current Densities

MAGNETIZATION MEASUREMENTS ON Bi2Sr2CaCu2Oy SINGLE-CRYSTAL

1989 ◽  
Vol 03 (01) ◽  
pp. 79-85 ◽  
Author(s):  
Z.S. CAO ◽  
D.N. ZHENG ◽  
G.H. CHEN ◽  
J.H. WANG ◽  
Y.F. YAN ◽  
...  
Keyword(s):  
Single Crystal ◽  
Critical Current ◽  
Critical State ◽  
Diamagnetic Susceptibility ◽  
Critical State Model ◽  
State Model ◽  
Magnetization Curves ◽  
Magnetization Measurements ◽  
Meissner Fraction

Diamagnetic susceptibility and the magnetization curves at 1.5 K and 77 K were measured on the single crystal of Bi 2 Sr 2 Ca 1 Cu 2 O y. The results show that the Meissner fraction is anisotropic and the susceptibility reduces slightly with temperature decreasing below 20 K. The magnetization curves exhibit the hysteresis at 1.5 K but no hysteresis is observed at 77 K. Critical current J c at 1.5 K and 77 K are estimated using critical state model.

Thickness and roughness dependence of magnetic flux penetration and critical current densities in YBa2Cu3O7−δ thin films

1996 ◽  
Vol 266 (3-4) ◽  
pp. 235-252 ◽  
Author(s):  
Ch. Jooss ◽  
A. Forkl ◽  
R. Warthmann ◽  
H.-U. Habermeier ◽  
B. Leibold ◽  
...  
Keyword(s):  
Thin Films ◽  
Magnetic Flux ◽  
Critical Current ◽  
Flux Penetration ◽  
Current Densities

scholarly journals Critical Current Densities and Force-displacement Characteristics of Fluxoids in Ba1-xKxFe2As2 Single Crystal

2012 ◽  
Vol 36 ◽  
pp. 704-709 ◽  
Author(s):  
Baorong Ni ◽  
Jun Ge ◽  
Masaru Kiuchi ◽  
Edmund Soji Otabe ◽  
Teruo Matsushita ◽  
...  
Keyword(s):  
Single Crystal ◽  
Critical Current ◽  
Current Densities ◽  
Force Displacement

Critical current densities in single‐crystal Bi2.2Sr2Ca0.8Cu2O8+δ

1988 ◽  
Vol 52 (22) ◽  
pp. 1910-1912 ◽  
Author(s):  
R. B. van Dover ◽  
L. F. Schneemeyer ◽  
E. M. Gyorgy ◽  
J. V. Waszczak
Keyword(s):  
Single Crystal ◽  
Critical Current ◽  
Current Densities

Quasi-one-dimensional BalrO3: On the verge of a weak ferromagnetic metallic state

2002 ◽  
Vol 12 (9) ◽  
pp. 91-92
Author(s):  
G. Cao ◽  
G. Shaw ◽  
J. W. Brill
Keyword(s):  
Phase Transition ◽  
Single Crystal ◽  
Ground State ◽  
Sharp Peak ◽  
Metallic State ◽  
Magnetization Measurements ◽  
One Dimensional ◽  
Impurity Doping ◽  
Weak Ferromagnetic

We report on calorimetric, resistivity, and magnetization measurements on single crystal BalrO3 and its derivatives. All results indicate a phase transition at $\rm T_c$=175 K, and two additional features are observed in resistivity: a sharp peak at 80 K and an upturn at 26 K. It is found that dilute impurity doping with Sr drastically suppresses $\rm T_c$ and leads to an instant nonmetal to metal transition below $\rm T_c$ underlining the instability of the ground state.

Observation of two critical current densities in a weakly pinned single crystal of Ca[sub 3]Rh[sub 4]Sn[sub 13]

2013 ◽  
Author(s):  
M. Babu Suresh ◽  
A. Thamizhavel ◽  
S. Ramakrishnan ◽  
A. K. Grover ◽  
D. Pal
Keyword(s):  
Single Crystal ◽  
Critical Current ◽  
Current Densities

Facet Topography and Dislocation Structure as a Possible Source for Electrical Heterogeneity in [001] TILT Bicrystals of YBa2Cu3O7-δ

1996 ◽  
Vol 54 ◽  
pp. 338-339
Author(s):  
I-Fei Tsu ◽  
D.L. Kaiser ◽  
S.E. Babcock
Keyword(s):  
Grain Boundary ◽  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Electromagnetic Properties ◽  
Length Scale ◽  
Density Values ◽  
Current Densities ◽  
Applied Fields ◽  
A Current

A current theme in the study of the critical current density behavior of YBa2Cu3O7-δ (YBCO) grain boundaries is that their electromagnetic properties are heterogeneous on various length scales ranging from 10s of microns to ˜ 1 Å. Recently, combined electromagnetic and TEM studies on four flux-grown bicrystals have demonstrated a direct correlation between the length scale of the boundaries’ saw-tooth facet configurations and the apparent length scale of the electrical heterogeneity. In that work, enhanced critical current densities are observed at applied fields where the facet period is commensurate with the spacing of the Abrikosov flux vortices which must be pinned if higher critical current density values are recorded. To understand the microstructural origin of the flux pinning, the grain boundary topography and grain boundary dislocation (GBD) network structure of [001] tilt YBCO bicrystals were studied by TEM and HRTEM.

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