Magnetic properties of oxygen deficient Yba2Cu3Ox thin films

✍ Scribed by S. Libbrecht; A.J.J. van Dalen; B. Wuyts; M. Maenhoudt; Z.X. Gao; E. Osquiguil; R. Griessen; Y. Bruynseraede

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 156 KB
• Volume: 235-240
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(94)90971-7

✦ Synopsis

We have investigated several superconducting properties of oxygen deficient YBa2Cu30 x thin films, with oxygen contents ranging from x = 6.55 to x = 7. By means of torque magnetometry, the temperature dependence of the superconducting current deusityjs and relaxation rate of the magnetization Q is measured in an (almost perpendicular) applied magnetic induction of 0.6 T. As the oxygen content is reduced, Js decreases, whereas Q increases. Both properties are influenced by the decreased doping level as well as the enhanced anisotropy of oxygen depleted YBa2Cu30 x. Using the Generalized Inversion Scheme derived by Schnack et al. we obtain the current dependence of the activation energy U0~). We show that U(]) is lowered when the oxygen content is reduced.