Anisotropic avalanches and flux penetration in patterned superconductors

作者：Gheorghe Diana G^*; Menghini Mariela; Wijngaarden Rinke J; Raedts Sophie; Silhanek Alejandro V; MoshchalkoV Victor V

来源：Physica C-Superconductivity and Its Applications, 2006, 437-38: 69-72.

DOI：10.1016/j.physc.2005.12.021

• vortex dynamics
• periodic pinning
• vortex avalanches

Both for a fundamental understanding of the flux penetration process and for technical applications, the role of artificial pinning sites (such as antidots) in superconductors generates a lot of interest. We perform magneto-optical imaging experiments on type-II Pb thin films patterned with square arrays of square antidots and square arrays of rectangular antidots and blind holes. We demonstrate that a square lattice of rectangular antidots can lead to similar anisotropy in flux penetration and critical current as a rectangular lattice of square antidots. In addition we show how thermo-magnetic avalanches can be guided-and hence to a certain extend controlled-by such holes.

• 出版日期2006-5-15