Flux pinning and improved critical current density in superconducting boron doped diamond films. (6th April 2018)

• Record Type: Journal Article
• Authors: Kumar, Dinesh; Samanta, Shibnath; Sethupathi, K; Rao, M S Ramachandra
• Is Part Of: Journal of physics communications. Volume 2:Number 4(2018)
• Publication Date: 2018-04-06
• Subjects: superconductivity -- upper critical field -- pinning potential -- critical current density; 74.20.Fg -- 81.05.ug -- 73.40.Qv -- 74.10.+v -- 74.25.Ha -- 61.05.cj; Physics -- Periodicals; 530.05
• DOI: 10.1088/2399-6528/aab39f
• Languages: English
• ISSNs: 2399-6528

Abstract

Abstract: The ability to carry transport current in a magnetic field is the most important aspect of a superconductor. We present a detailed analysis of the upper critical field ( H c 2 (0)) and vortex dynamics in superconducting boron doped diamond (BDD) films. H c 2 (0) measured on the samples of different doping levels revealed a high critical field of up to 7.3 T. Pinning potential U 0, estimated using thermally activated flux-flow (TAFF) model shows that U 0 is of the order of 10 2 K. Self-field critical current density ( J c ) estimated for the superconducting BDD films showed large J c ∼ 10 7 A/cm 2 due to enhanced flux trapping.