Browsing by Author "Ivanova, Z."

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    Superconductivity in Magnesium Diboride Thin Films
    (2002-04) Ivanova, Z.; Malisa, Anayesu B.; Johansson, L. -G; Komissinski, P. V.
    Mg–B thin films were grown in situ on (1 0 0) SrTiO3 substrates by pulsed laser deposition. Targets pressed from a commercial MgB2 powder had a superconducting transition temperature of 37 K. Films were characterized by atomic force microscopy and susceptibility measurements. First samples showed superconducting onset at 30 K and became superconducting at about 20 K. Films were patterned into microbridges 4–100 μm wide by Ar ion beam milling. Films had large contact resistances, of the order of 500 Ω cm2 in the temperature range 4.2–300 K.