DocumentCode :
51914
Title :
Vortex Doping Into Superconducting {\\rm Mo}_{80}{\\rm Ge}_{20} Square Network
Author :
Ho Thanh Huy ; Hayashi, Mariko ; Kato, Masaaki ; Nguyen Van Hieu ; Ishida, Tomoyuki
Author_Institution :
Dept. of Phys. & Electron., Osaka Prefecture Univ., Sakai, Japan
Volume :
50
Issue :
6
fYear :
2014
fDate :
Jun-14
Firstpage :
1
Lastpage :
4
Abstract :
We have fabricated the finite-sized amorphous Mo80Ge20 superconducting networks with 10×10 square holes and directly observed the vortex structures by means of using the scanning SQUID microscope. On the increase of the field in a stepwise manner, the vortex penetration into the network is likely to follow the Bean critical model, wherein vortices first enter the network from the edges and penetrate deeper toward the center of the network as the field increases. We observed that the evolution of vorticity mainly occurred along the diagonal direction of the network, which has a narrow wire compared with the hole size. The vortex pattern was strongly modified as the system was cooled down below Tc. A diagonal vortex array appeared at intermediate temperatures, and is transformed into the isolated vortices at lower temperatures due to the strong repulsive interaction between vortices.
Keywords :
Bean model; amorphous state; cooling; flux-line lattice; germanium alloys; molybdenum alloys; Bean critical model; Mo80Ge20; diagonal direction; diagonal vortex array; finite-sized amorphous superconducting networks; intermediate temperatures; isolated vortices; scanning SQUID microscopy; superconducting square network; vortex doping; vortex pattern; vortex penetration; vortex structures; Amorphous magnetic materials; Arrays; Educational institutions; Magnetic resonance imaging; SQUIDs; Superconducting magnets; Temperature measurement; Amorphous; SQUID; superconductivity; vortex;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/TMAG.2014.2304980
Filename :
6832855
Link To Document :
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