As-grown superconducting MgB[sub 2] thin films prepared by molecular beam epitaxy

Ueda, Kenji; Naito, Michio
September 2001
Applied Physics Letters;9/24/2001, Vol. 79 Issue 13
Academic Journal
Superconducting thin films of magnesium diboride (MgB[sub 2]) were prepared on various substrates [SrTiO[sub 3] (001), sapphire R, sapphire C and Si (111)] by molecular beam epitaxy. The growth temperature was examined in the ambient to 650 °C. Only films formed at temperatures between 150 and 320 °C showed superconductivity. The best T[sub C][sup onset] of 36 K with a sharp transition width of ∼1 K was observed. The T[sub C] of the as-grown superconducting MgB[sub 2] thin films is close to the bulk value. © 2001 American Institute of Physics.


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