As-grown crystallized thin film of Bi-Sr-Ca-Cu-O and its low-temperature annealing effect

Miura, S.; Nakai, A.; Shimakawa, Y.; Yoshitake, T.; Miyasaka, Y.; Shohata, N.; Satoh, T.
April 1989
Applied Physics Letters;4/10/1989, Vol. 54 Issue 15, p1474
Academic Journal
The as-grown crystallized films of low Tc phase (Tc∼80 K) in a Bi-Sr-Ca-Cu-O system were prepared by rf magnetron sputtering and were annealed in argon or oxygen atmosphere below 500 °C. Superconducting properties and the c-axis lattice constant varied according to the annealing temperature and atmosphere. These results suggest that the oxygen content in the film is varied by low-temperature annealing and that the variation of oxygen content affects the superconducting and structural properties. By cooling the sample in the chamber in 760 Torr oxygen, the as-grown film with Tc end at 74 K was obtained.


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