Vortex distribution in small star-shaped Mo 80 Ge 20 plate
| Autor: | Hiroaki Shishido, Ho Thanh Huy, Hiroki Miyoshi, Takekazu Ishida, Hitoshi Matsumoto, Masaru Kato |
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| Rok vydání: | 2017 |
| Předmět: |
Scanning SQUID microscope
Physics Diffraction Superconductivity Condensed matter physics Energy Engineering and Power Technology Condensed Matter Physics 01 natural sciences Finite element method Vortex state 010305 fluids & plasmas Electronic Optical and Magnetic Materials Vortex Magnetic field Condensed Matter::Superconductivity 0103 physical sciences Homogeneity (physics) Electrical and Electronic Engineering 010306 general physics |
| Zdroj: | Physica C: Superconductivity and its Applications. 533:44-48 |
| ISSN: | 0921-4534 |
| Popis: | We investigated vortex states in small star-shaped Mo 80 Ge 20 plates both theoretically and experimentally. The numerical calculations of the Ginzburg–Landau equation have been carried out with the aid of the finite element method, which is convenient to treat an arbitrarily shaped superconductor. The experimental results were observed by using a scanning SQUID microscope. Through systematic measurements, we figured out how vortices form symmetric configuration with increasing the magnetic field. The vortex distribution tends to adapt to one of five mirror symmetric lines when vortices were located at the five triangular horns of a star-shaped plate. The crystalline homogeneity of a sample was confirmed by the X-ray diffraction and the superconducting properties so that vortices are easily able to move for accommodating vortices in the geometric symmetry of the star-shaped plate. The experimental vortex configurations obtained for a star-shaped plate are in good agreement with theoretical predictions from the nonlinear Ginzburg–Landau equation. |
| Databáze: | OpenAIRE |
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