RF susceptibility of magnetron sputtered YBaCuO−x films

✍ Scribed by J Lindenmájer; N Hegman; S Mészáros; K Vad; G Langer; A Csík

• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 377 KB
• Volume: 50
• Category: Article
• ISSN: 0042-207X
• DOI: 10.1016/s0042-207x(98)00075-x

✦ Synopsis

We measured the complex susceptibility of two different quality magnetron sputtered YBa 2 Cu 3 O 7-x films in RF range. Temperature and static magnetic field dependence of complex magnetic susceptibility is a useful indicator of appearance of phase coherence in the film including fluctuation region above T c . The characteristics showed a low frequency type behaviour at loss peak and diamagnetic drop at near transition temperature and normal state non-zero susceptibility. One of our samples displayed an enhanced diamagnetism in the normal state close to T c , which was probably attributed to the combination of the normal skin effect and excess conductivity due to superconductive fluctuations. The low temperature susceptibility was also frequency dependent and qualitatively agreed with the vortex-glass scaling model.