Magnetic Investigations of Superconductive, Polycrystalline (RE)1Ba2Cu3O7−x Compounds (RE = Y, Gd, Ho, Dy)

1987 ◽  
Vol 99 ◽  
Author(s):  
J. R. Thompson ◽  
L. A. Boatner ◽  
J. Brynestad ◽  
D. K. Christen ◽  
Y. C. Kim ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Rare Earth ◽  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Substantial Degree

ABSTRACTMagnetic properties have been investigated for several rare-earth based, polycrystalline samples of high Tc superconductive “123” compounds with magnetic onset temperatures between 90 and 95 K. Analysis of the susceptibility × of samples based on Gd, Ho, and Dy indicates that the superconductive and magnetic properties are independent of one another to a substantial degree. Studies of the critical current density Jc are reported.

Systematic enhancement of in-field critical current density with rare-earth ion size variance in superconducting rare-earth barium cuprate films

2004 ◽  
Vol 84 (26) ◽  
pp. 5329-5331 ◽  
Author(s):  
J. L. MacManus-Driscoll ◽  
S. R. Foltyn ◽  
Q. X. Jia ◽  
H. Wang ◽  
A. Serquis ◽  
...  
Keyword(s):  
Rare Earth ◽  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Rare Earth Ion ◽  
Cuprate Films ◽  
Ion Size

Changing the Critical Current Density and Magnetic Properties of YBa $_2$ Cu $_3$ O $_7$ by Using Large Antidots

2018 ◽  
Vol 28 (4) ◽  
pp. 1-5 ◽  
Author(s):  
Antony Jones ◽  
Jonathan George ◽  
Sergey A. Fedoseev ◽  
Simon K. H. Lam ◽  
Jia Du ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Critical Current Density ◽  
Critical Current ◽  
Current Density

Bulk Ceramic and Screen Printed EuBa2Cu3O7-δ

1987 ◽  
Vol 99 ◽  
Author(s):  
W. S. Fu ◽  
D. S. Ginley ◽  
M. A. Mitchell ◽  
E. L. Venturini ◽  
B. Morosin ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Thick Films ◽  
Weak Links ◽  
Bulk Ceramic ◽  
Zero Resistance ◽  
Two Phases ◽  
Screen Printed

ABSTRACTThe structural, magnetic and electrical properties of EuBa2Cu3O7-δ have been investigated both for bulk ceramics and screen printed thick films. The bulk ceramic reaches zero resistance at 92 K, and has large intragranular critical current density inferred from magnetization loops; the directly measured critical current density is substantially lower because of the weak links (Josephson junctions) between grains. Screen printed thick films on strontium titanate have poor magnetic and resistive transitions with evidence for two phases. High temperature oxygen anneals produce a bulk ceramic with significantly enhanced magnetic properties.

Critical current density and magnetic properties of a melt‐processed Y0.8Ho0.2Ba2Cu3Oysuperconductor

1993 ◽  
Vol 74 (8) ◽  
pp. 5096-5100 ◽  
Author(s):  
Yong Feng ◽  
Lian Zhou ◽  
Keguang Wang ◽  
Yuheng Zhang ◽  
Xin Jin ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Critical Current Density ◽  
Critical Current ◽  
Current Density

scholarly journals Mathematical modeling of the magnetic properties of axisymmetric hard superconductors of the second kind in the Kim model

2020 ◽  
Vol 22 (4) ◽  
pp. 456-462
Author(s):  
Nikolay D. Kuzmichev ◽  
Aleksey A. Shushpanov ◽  
Mihail A. Vasyutin
Keyword(s):  
Mathematical Modeling ◽  
Magnetic Field ◽  
Magnetic Properties ◽  
Critical Current Density ◽  
Critical Current ◽  
Current Distribution ◽  
Current Density ◽  
Local Magnetic Field ◽  
Aspect Ratios ◽  
Kim Model

Authors perform mathematical modeling of magnetic properties, such as current distribution, intrinsic magnetic field and magnetization of a number of axisymmetric superconductors of the second kind, for example, of a sphere with the dependence of the critical current density on the local magnetic field in the Kim model. The simulation is based on equation that is integral with respect to coordinate and differential with respect to time. The equation describes time evolution of the critical current density and is solved numerically for a uniformly varying external magnetic field. The shape of the sample is set using a distorted rectangular irregular mesh with compaction to the edges of the sample. While solving the equation of current motion, the total magnetic field iscalculated at the points of the superconductor to calculate the value of the critical current density. In the article, the obtained solutions are used to visualize the current distribution in the volume of a superconductor and to construct magnetization hysteresis loops. Also, thanks to the calculations of the magnetic field in the center of the sample, the dependencies of the total penetration field for samples with different aspect ratios are obtained.

EFFECTS OF SUBSTITUTIONS OF COPPER AT THE CHAIN SITE ON THE TRANSPORT AND MAGNETIC PROPERTIES OF YBa2Cu2(Cu1-xMx)O6+w

2000 ◽  
Vol 14 (25n27) ◽  
pp. 2809-2814 ◽  
Author(s):  
G. GUAGLIO ◽  
A. GAUZZI ◽  
F. LICCI ◽  
M. MAREZIO ◽  
P. FERRO ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Irreversibility Line ◽  
Substitution Level ◽  
Irreversibility Lines

We prepared polycrystalline samples of YBa 2 Cu 2( Cu 1-x M x) O 6+w, where M (=Sc, Cr, V, Fe, Al and Au) substitutes copper in the chain site, and measured their transport and magnetic properties. The substitution level x was 0.05 and 0.10 for each substituent. We determined the solubility of the different metals and the dependence of Tc, irreversibility lines and critical current density jc on M and x. An improvement of jc by a factor larger than 2 was obtained in the Fe-, Al-, Cr- and V- substituted materials. No improvement of the irreversibility line was obtained for any substituent.

Fishtail effect, magnetic properties and critical current density of Gd-added PMP YBCO

1998 ◽  
Vol 297 (1-2) ◽  
pp. 75-84 ◽  
Author(s):  
Yong Feng ◽  
Lian Zhou ◽  
J.G Wen ◽  
N Koshizuka ◽  
A Sulpice ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Critical Current Density ◽  
Critical Current ◽  
Current Density
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