Superconducting MgB2 thin films by pulsed laser deposition

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2001-07-09
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Shinde, S.
Ogale, S.
Greene, R.
Venkatesan, T.
Bud'ko, Sergey
Lapertot, G.
Petrovic, Cedomir
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Canfield, Paul
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Ames National Laboratory

Ames National Laboratory is a government-owned, contractor-operated national laboratory of the U.S. Department of Energy (DOE), operated by and located on the campus of Iowa State University in Ames, Iowa.

For more than 70 years, the Ames National Laboratory has successfully partnered with Iowa State University, and is unique among the 17 DOE laboratories in that it is physically located on the campus of a major research university. Many of the scientists and administrators at the Laboratory also hold faculty positions at the University and the Laboratory has access to both undergraduate and graduate student talent.

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Physics and Astronomy
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Growth of MgB2thin films by pulsed laser deposition is examined under ex situ and in situprocessing conditions. For the ex situ process, boronfilmsgrown by pulsed laser deposition were annealed at 900 °C with excess Mg. For the in situ process, different approaches involving ablation from a stoichiometric target under different growth conditions, as well as multilayer deposition involving interposed Mg layers were examined and analyzed. Magnetic measurements on ex situ processed films show Tc of ∼39 K, while the current best in situfilms show a susceptibility transition at ∼22 K.

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The following article appeared in Applied Physics Letters 79 (2001): 227 and may be found at http://dx.doi.org/10.1063/1.1385186.

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Mon Jan 01 00:00:00 UTC 2001
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