Comparative study of magnetic and transport properties and E-J characteristics analysis of epitaxial YBa2Cu7−δ thin films

✍ Scribed by A.A Zhukov; J.P Ströbel; P Kummeth; M Kraus; S Peehs; W Schindler; I Khasanow; H.-W Neumüller; G Saemann-Ischenko; A.A Yarygin; S.I Krasnosvobodtzev

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 466 KB
• Volume: 33
• Category: Article
• ISSN: 0011-2275
• DOI: 10.1016/0011-2275(93)90093-4

✦ Synopsis

A comparative study of transport and magnetic properties was made for epitaxial YBa2cu307_~ thin films. Good correspondence was found for the current-voltage characteristics determined by transport and magnetic measurements. This fact gives direct evidence for the validity of the Bean model in the case of thin films. Different types of E(J) relations were analysed. The best agreement was found for the current-voltage characteristics with the vortex activation energy dependence U(J)= Uo(Jo/J) ~. The temperature dependences of the parameter # are obtained for different magnetic fields.