Electrical properties of thin films of Eu2O3 substituted compounds |
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Authors: | S Bhattacharjee and B Baishya |
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Institution: | (1) Department of Physics, Dibrugarh University, Dibrugarh, 786 004, Assam, India |
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Abstract: | Europium oxide (Eu2O3) substituted compound has been prepared by solid-solid reaction of the powders of Eu2O3, BaCO3 and CuO at 950°C for 16 hours. The thin films have been deposited by high vacuum evaporation technique (vacuum ≈ 10−6 torr). The variation of current (I) with voltage (V) at room temperature (RT) i.e. 294 K and in ice (273 K) are found to be linear. The variation of electrical resistivity (ρ) with temperature (T) by heating the sample above RT has been determined. Resistivity is found to decrease with increase in temperature. Further the variation of electrical resistivity
(ρ) with temperature (T) from 77 K, liquid nitrogen temperature (LNT), to 270 K has also been determined. It is observed that resistivity suddenly
becomes zero at around 87 K. Thus the prepared material has superconducting properties with superconducting transition temperature,
T
c
at 87 K.
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Keywords: | ρ -T characteristics EBCO film high vacuum technique superconductivity |
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