Abstract

We have investigated the thermodynamic and kinetic barriers involved in the synthesis of MgB2 films. This work refines our initial conjectures predicting optimal MgB2 thin film growth conditions as a consequence of the unusually large kinetic barrier to MgB2 decomposition. The small Mg sticking coefficient at temperatures greater than 300 °C prevents high temperature synthesis with traditional vacuum growth methods. However, as a result of the large kinetic barrier to MgB2 decomposition, in-situ thermal processing can be used to enhance the crystallinity and the superconductivity of MgB2 films. We used these methods to produce MgB2 thin films with relatively high transition temperatures (∼37 K) by pulsed laser deposition (PLD).

Original languageEnglish (US)
Pages (from-to)3238-3241
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Volume13
Issue number2 III
DOIs
StatePublished - Jun 2003

Fingerprint

Thermochemistry
thermochemistry
Thin films
Kinetics
kinetics
synthesis
thin films
Decomposition
decomposition
Film growth
Pulsed laser deposition
Superconductivity
Superconducting transition temperature
pulsed laser deposition
crystallinity
superconductivity
transition temperature
Thermodynamics
Vacuum
Temperature

Keywords

  • MgB
  • Superconductor
  • Thermochemistry
  • Thin films

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Physics and Astronomy (miscellaneous)

Cite this

Thermochemistry of MgB2 thin film synthesis. / Kim, Jihoon; Singh, Rakesh; Newman, Nathan; Rowell, John M.

In: IEEE Transactions on Applied Superconductivity, Vol. 13, No. 2 III, 06.2003, p. 3238-3241.

Research output: Contribution to journalArticle

Kim, Jihoon ; Singh, Rakesh ; Newman, Nathan ; Rowell, John M. / Thermochemistry of MgB2 thin film synthesis. In: IEEE Transactions on Applied Superconductivity. 2003 ; Vol. 13, No. 2 III. pp. 3238-3241.
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