In-situ Magnesium Diboride Superconducting Thin Films grown by Pulsed Laser Deposition

Details In-situ Magnesium Diboride Superconducting Thin Films grown by Pulsed Laser Deposition In-situ Magnesium Diboride Superconducting Thin Films grown by Pulsed Laser Deposition

2001-03-27

arxiv.org/abs/cond-mat/0103572v2

Physics

Condensed Matter

Superconductivity

10 pages, 4 figures

Scientific paper

10.1088/0953-2048/14/9/326

Superconducting thin films of MgB2 were deposited by Pulsed Laser Deposition on magnesium oxide and sapphire substrates. Samples grown at 450C in an argon buffer pressure of about 10-2 mbar by using a magnesium enriched target resulted to be superconducting with a transition temperature of about 25 K. Film deposited from a MgB2 sintered pellet target in ultra high vacuum conditions showed poor metallic or weak semiconducting behavior and they became superconducting only after an ex-situ annealing in Mg vapor atmosphere. Up to now, no difference in the superconducting properties of the films obtained by these two procedures has been evidenced.

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