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Magnetoresistance Study of c-Axis Oriented YBCO Thin Film

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Chrobak M., Woch W., Kowalik M., Zalecki R., Giebułtowski M., Przewoźnik J., Kapusta C., Szwachta G.

The c-axis orientation YBa₂Cu₃O_δ 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 T_{c50%}=87.5 K and the width of superconducting transition is ΔT = 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=CH^m +Δ T₀. The irreversibility fields as a function of temperature were obtained and fitted by the de Almeida and Thouless-like equation: H_{irr}=H_{irr0}(1-T/T_{c0})^n. The irreversibility field at the liquid nitrogen temperature was calculated and it is H_{irr}=43.8 kOe when the applied magnetic field is parallel to the c-axis.

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1 Acta Physica Polonica A

1 2017

1 Chrobak M.

1 Giebułtowski M.

1 Kapusta C.

1 Kowalik M.

1 Przewoźnik J.

1 Szwachta G.

1 Woch W.

1 Zalecki R.

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Magnetoresistance Study of c-Axis Oriented YBCO Thin Film