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arXiv · 1208.2949

Generating strong magnetic flux shielding regions in a single crystal of Bi2Sr2CaCu2O8 using a blind hole array

Gorky Shaw·Biplab Bag·S. S. Banerjee·Hermann Suderow·T. Tamegai
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Abstract

Magneto-optical imaging studies in a single crystal of Bi2Sr2CaCu2O8 partially patterned with a hexagonal array of pinning centers (blind holes) reveals local features in the patterned region which are distinct compared to the pristine unpatterned regions in the sample. The patterned area exhibits a strongly diamagnetic local magnetization response and is characterized by a local penetration field enhanced by a factor of three. We show that strong shielding currents around the periphery of the nanopatterned region create a barrier which prevents vortex entry into the patterned region thus sustaining an effectively flux-free state upto the enhanced penetration field.

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Gorky Shaw, Biplab Bag, S. S. Banerjee, Hermann Suderow, T. Tamegai. 2012-08-14. Generating strong magnetic flux shielding regions in a single crystal of Bi2Sr2CaCu2O8 using a blind hole array. https://doi.org/10.1088/0953-2048%2F25%2F9%2F095016

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