Magnetoresistance Study of c-Axis Oriented YBCO Thin Film |
| M. Chrobak a, W.M. Wocha, M. Kowalik a, R. Zalecki a, M. Giebułtowski a, J. Przewoźnik a, Cz. Kapusta a and G. Szwachtab,c
aSolid State Physics Department, Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, al. A. Mickiewicza 30, 30-059 Krakow, Poland bDepartment of Surface Engineering and Materials Characterization, Faculty of Metals Engineering and Industrial Computer Science, AGH University of Science and Technology, al. A. Mickiewicza 30, 30-059 Krakow, Poland cAcademic Centre for Materials and Nanotechnology, AGH University of Science and Technology, al. A. Mickiewicza 30, 30-059 Krakow, Poland |
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| The c-axis orientation YBa2Cu3Oδ thin film was prepared directly on MgO substrate by the pulse laser deposition. The thickness of the film is 170 nm. The superconducting critical temperature is Tc50%=87.5 K and the width of superconducting transition is Δ T=1.8 K. The temperature dependences of magnetoresistance were measured up to 90 kOe. The widths of the transition to the superconducting state versus applied magnetic field were derived and they were fitted using the formula: Δ T=CHm +Δ T0. The irreversibility fields as a function of temperature were obtained and fitted by the de Almeida and Thouless-like equation: Hirr=Hirr0(1-T/Tc0)n. The irreversibility field at the liquid nitrogen temperature was calculated and it is Hirr=43.8 kOe when the applied magnetic field is parallel to the c-axis. |
DOI: 10.12693/APhysPolA.131.1018 PACS numbers: 74.72.-h, 74.78.-w, 74.25.Op, 74.25.Qt, 74.78.Bz, 74.25.Qt |