Penetration of vortices into micro-superconductors observed with a scanning SQUID microscope

Nishio, Taichiro; Okayasu, Satoru ; Suzuki, Junichi; Kadowaki, Kazuo

We have studied the vortex states in a meoscopic superconductor with geometrical constraints such as disks, triangles, squares, etc. with dimensions between 30-50m using a scanning SQUID microscope (SQM2000,Seiko Instruments Inc.). The sample was fabricated by electron lithography and Focused Ion Beam (FIB) techniques. Quantized vortices enter into a mesoscopic superconductor discretely as a function of magnetic field accompanied by the sequential step-wise jump of magnetization of the superconductor. Quantitative as well as qualitative analyses of spatial vortex arrangement as a function of the number of vortices will be shown in comparison with the recent theoretical predictions.

Language	:	English
Journal	:	Physica C
Volume	:	412-414
Number	:	Part1
Pages	:	p.379 - 384
Publication Year/Month	:	2004/10
Meeting title	:	16th International Symposium on Superconductivity (ISS 2003)
Held date	:	2003/10
Location (city)	:	Tsukuba
Location (country)	:	Japan
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Keywords	:	Scanning SQUID Microscope; Mesoscopic Superconductor; Vortex
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Registration No. : B20030623
JAEA Abstracts No. : 330029
Paper Submission No. : 21458

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