Scalinglaws Jc (H/Hc3(Θ)) and intrinsic surface superconductivity in YBa2Cu3O7−δ

✍ Scribed by J.M. Barbut; D. Bourgault; N. Schopohl; A. Sulpice; R. Tournier

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 159 KB
• Volume: 235-240
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(94)91024-3

✦ Synopsis

Critical current densities Jc(0,H) of magnetically melt-textured YBCO single domains have been measured at T = 77 K for various magnetic field amplitudes and 0 angles of the field H with the ab plane. For 0 < 0c ab, Jc scales better with the 2d model (Hsin0) than with other models. In high maanetic fields, for o ....

s/lab

s//fib . . 0c ab < 0 < 72 , Jc =s ent=rely determined by the scahng parameter H/Hc3 (0), where H~3 (0) Ls the thtrd critical field of an anisotropic superconductor for intrinsic surfaces parallel to the ab planes. In the 72 ° < 0 < 90 ° angular range, Jc is determined by twin planes which play the role of surfaces for nucleation of superconductivity.