DocumentCode :
1124368
Title :
Superconducting Properties and Microstructures of 
Thin Films Fabricated With the Precursor and Post-Annealing Method
Author :
Matsumoto, Akiyoshi ; Takahashi, Ken-Ichiro ; Tachiki, Minoru ; Kitaguchi, Hitoshi ; Kumakura, Hiroaki
Author_Institution :
Nat. Inst. for Mater. Sci., Tsukuba, Japan
Volume :
19
Issue :
3
fYear :
2009
fDate :
6/1/2009 12:00:00 AM
Firstpage :
2823
Lastpage :
2826
Abstract :
The critical current densities (J c) of MgB2 thin films deposited on alpha-Al2O3 fabricated with a precursor and post-annealing process have been investigated in high magnetic fields of up to 30 T. The H c2(0) estimated from the resistivity measurements was ~45 T. High J c values were obtained at 4.2 K in external magnetic fields applied parallel to the film surface. These values were comparable to that of Nb3Sn in fields up to 18 T and surpassed them in fields over 18 T. To reduce the number of droplets, the Eclipse PLD method was one of the most useful techniques.
Keywords :
annealing; critical current density (superconductivity); crystal microstructure; electrical resistivity; magnesium compounds; pulsed laser deposition; superconducting critical field; superconducting thin films; Al2O3; MgB2; critical current densities; droplets; eclipse pulse laser deposition method; high magnetic fields; microstructures; post-annealing method; resistivity measurements; superconducting critical field; superconducting properties; superconductor thin films; $H_{{rm c}2}$ ; $J_{rm c}$ ${rm MgB}_{2}$
fLanguage :
English
Journal_Title :
Applied Superconductivity, IEEE Transactions on
Publisher :
ieee
ISSN :
1051-8223
Type :
jour
DOI :
10.1109/TASC.2009.2018281
Filename :
5153251
Link To Document :
