scholarly journals Enhancement of Critical Current Densities in (Ba,K)Fe2As2by 320 MeV Au Irradiation in Single Crystals and by High-Pressure Sintering in Powder-in-Tube Wires

2013 ◽  
Vol 6 (12) ◽  
pp. 123101 ◽  
Author(s):  
Sunseng Pyon ◽  
Toshihiro Taen ◽  
Fumiaki Ohtake ◽  
Yuji Tsuchiya ◽  
Hiroshi Inoue ◽  
...  
Keyword(s):  
High Pressure ◽  
Single Crystals ◽  
Critical Current ◽  
High Pressure Sintering ◽  
Current Densities ◽  
Powder In Tube

Enhancement of critical current densities by high-pressure sintering in (Sr,K)Fe2As2PIT wires

2014 ◽  
Vol 27 (9) ◽  
pp. 095002 ◽  
Author(s):  
Sunseng Pyon ◽  
Yuji Tsuchiya ◽  
Hiroshi Inoue ◽  
Hideki Kajitani ◽  
Norikiyo Koizumi ◽  
...  
Keyword(s):  
High Pressure ◽  
Critical Current ◽  
High Pressure Sintering ◽  
Current Densities

High Critical Current Density of a MgB2 Bulk Superconductor High-pressure Synthesized Directly from the Elements

2002 ◽  
Vol 17 (3) ◽  
pp. 525-527 ◽  
Author(s):  
C-Q. Jin ◽  
S-C. Li ◽  
J-L. Zhu ◽  
F-Y. Li ◽  
Z-X. Liu ◽  
...  
Keyword(s):  
High Pressure ◽  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Superconducting Transition ◽  
High Critical Current Density ◽  
Bulk Superconductor ◽  
High Pressure Sintering ◽  
Current Densities ◽  
Pressure Synthesis

We report the property studies of a MgB2 superconductor with high critical current density. The MgB2 superconductor was readily fabricated through a direct high-pressure synthesis of the respective elements. The obtained high-density MgB2 undergoes a sharp superconducting transition at 39 K. The bulk critical current density (Jc) of the sample was calculated on the basis of Bean's critical state model, and rather high critical current densities over a wide temperature range were obtained in comparison with the ambient prepared samples. The results highlight that high-pressure sintering would be a promising way to produce and search for this kind of intermetallic boride and the related superconductors.

scholarly journals Enhancement of critical current density in (Ba,Na)Fe2As2 round wires using high-pressure sintering

2020 ◽  
Vol 33 (6) ◽  
pp. 065001 ◽  
Author(s):  
Sunseng Pyon ◽  
Daisuke Miyawaki ◽  
Tsuyoshi Tamegai ◽  
Satoshi Awaji ◽  
Hijiri Kito ◽  
...  
Keyword(s):  
High Pressure ◽  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
High Pressure Sintering

scholarly journals Critical current densities of high pressure oxygen sputtered thin films of YBa2Cu3O7−x by non-resonant rf absorption method

Pramana ◽  
1993 ◽  
Vol 40 (2) ◽  
pp. 119-122 ◽  
Author(s):  
V V Srinivasu ◽  
S V Bhat ◽  
G K Muralidhar ◽  
G Mohan Rao ◽  
S Mohan
Keyword(s):  
Thin Films ◽  
High Pressure ◽  
Critical Current ◽  
Absorption Method ◽  
Pressure Oxygen ◽  
High Pressure Oxygen ◽  
Current Densities

Critical current densities of powder-in-tube MgB2 tapes fabricated with nanometer-size Mg powder

2004 ◽  
Vol 84 (10) ◽  
pp. 1728-1730 ◽  
Author(s):  
H. Yamada ◽  
M. Hirakawa ◽  
H. Kumakura ◽  
A. Matsumoto ◽  
H. Kitaguchi
Keyword(s):  
Critical Current ◽  
Nanometer Size ◽  
Current Densities ◽  
Powder In Tube

Effects of high-pressure sintering on critical current density in Co-doped BaFe2As2 wires

2014 ◽  
Vol 504 ◽  
pp. 73-76 ◽  
Author(s):  
Hiroshi Inoue ◽  
Yuji Tsuchiya ◽  
Shinya Tada ◽  
Sunseng Pyon ◽  
Hideki Kajitani ◽  
...  
Keyword(s):  
High Pressure ◽  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
High Pressure Sintering ◽  
Co Doped

Improved critical current densities in ex situ processed MgB2 tapes fabricated with chemically treated powder

2007 ◽  
Vol 22 (5) ◽  
pp. 1281-1285 ◽  
Author(s):  
H. Fujii ◽  
K. Togano ◽  
K. Ozawa
Keyword(s):  
Critical Current Density ◽  
Benzoic Acid ◽  
Acid Solution ◽  
Critical Current ◽  
Benzene Solution ◽  
Ex Situ ◽  
Chemically Treated ◽  
Current Densities ◽  
Powder In Tube ◽  
Mgo Layers

Fe-sheathed MgB2 tapes were fabricated using powder chemically treated through an ex situ process employing a powder-in-tube (PIT) technique. The treatment of MgB2 powder in a benzene solution of benzoic acid caused the pulverization and disappearance of large grains. Compared with the pristine powder without treatment, the tape made from this powder showed a fivefold increase in critical current density (Jc) in 10 T. This was due to the pulverization of grains by the chemical treatment and the removal of surface MgO layers from MgB2 grains by dissolution in the acid solution. The removal of MgO layers was effective in promoting substitution of carbon from the solvent for boron.

Influence of oxygen deficiency on anisotropy and -axis critical current densities in single crystals

1999 ◽  
Vol 12 (3) ◽  
pp. 135-141 ◽  
Author(s):  
J V Thomas ◽  
G K Perkins ◽  
D E Lacey ◽  
J T Totty ◽  
L F Cohen ◽  
...  
Keyword(s):  
Single Crystals ◽  
Critical Current ◽  
Oxygen Deficiency ◽  
Current Densities
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