2012/07/10 by Gorky Shaw, Biplab Bag, S. S. Banerjee +4
Engineering · Physics and Astronomy · #Diamagnetism #Electromagnetic shielding #Hexagonal crystal system #Magnetic field #Magnetic properties of thin films #Magnetization #Magneto-Optical Properties and Applications #Penetration depth #Physics of Superconductivity and Magnetism #Single crystal #Vortex #cond-mat.mtrl-sci #cond-mat.supr-con
paper · pdf · doi:10.1088/0953-2048/25/9/095016
published as Supercond. Sci. Technol. 25, 095016 (2012) · 11 pages, 4 figures
openalex publication_date 2012/07/10 · arxiv created 2012/08/14 · arxiv updated 2012/08/15 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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.