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CO2 laser ablated BiSrCaCuO superconducting thin films

✍ Scribed by A.L. Li; I. Shih; A.A. Gundjian

Book ID
103946750
Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
470 KB
Volume
208
Category
Article
ISSN
0921-4534

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✦ Synopsis

Thin films of BiSrCaCuO have been deposited on unheated crystalline M$O (100) substrates using a TEA CO2 pulsed laser with a wavelength of 10.6 pan. The target used was Caand Cu-rich and contained Pb to enhance the formation of high-TΒ© phase. Superconducting fdms were produced after a short two-step annealing at 800Β°C-825Β°C and 850Β°C-865Β°C. The highest onset Tc on the treated films was 115 K and the zero resistance Tc was 99.5 IC The effects of deposition pressure and post annealing on the properties of the films were specifically investigated. The morphology of the superconducting thin trims was studied by scanning electron microscopy and a mixture of 2212 and 2223 phases was obe~erved in X-ray diffraction patterns.

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