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Cubic Sc1-xAlxN sol...
Cubic Sc1-xAlxN solid solution thin films deposited by reactive magnetron sputter epitaxy onto ScN(111)
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- Höglund, Carina (author)
- Linköpings universitet,Tunnfilmsfysik,Tekniska högskolan
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- Bareno, Javier (author)
- Linköpings universitet,Institutionen för fysik, kemi och biologi,Tekniska högskolan
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- Birch, Jens (author)
- Linköpings universitet,Tunnfilmsfysik,Tekniska högskolan
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- Alling, Björn (author)
- Linköpings universitet,Teoretisk Fysik,Tekniska högskolan
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- Czigany, Zsolt (author)
- Hungarian Acadamy of Science
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- Hultman, Lars (author)
- Linköpings universitet,Tunnfilmsfysik,Tekniska högskolan
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(creator_code:org_t)
- AIP Publishing, 2009
- 2009
- English.
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In: JOURNAL OF APPLIED PHYSICS. - : AIP Publishing. - 0021-8979 .- 1089-7550. ; 105:11, s. 132862-
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Reactive magnetron sputter epitaxy was used to deposit thin solid films of Sc1-xAlxN (0 andlt;= x andlt;= 1) onto MgO(111) substrates with ScN(111) seed layers. Stoichiometric films were deposited from elemental Sc and Al targets at substrate temperatures of 600 S C. The films were analyzed by Rutherford backscattering spectroscopy, elastic recoil detection analysis, x-ray diffraction, and transmission electron microscopy. Results show that rocksalt structure (c)-Sc1-xAlxN solid solutions with AlN molar fractions up to similar to 60% can be synthesized. For higher AlN contents, the system phase separates into c- and wurtzite structure (w)-Sc1-xAlxN domains. The w-domains are present in three different orientations relative to the seed layer, namely, Sc1-xAlxN(0001)parallel to ScN(111) with Sc1-xAlxN[(1) over bar2 (1) over bar0]parallel to ScN[1 (1) over bar0], Sc1-xAlxN(10 (1) over bar1)parallel to ScN(111) with Sc1-xAlxN[(1) over bar2 (1) over bar0]parallel to ScN[1 (1) over bar0], and Sc1-xAlxN(10 (1) over bar1)parallel to ScN(113). The results are compared to first-principles density functional theory calculations for the mixing enthalpies of c-, w-, and zinc blende Sc0.50Al0.50N solid solutions, yielding metastability with respect to phase separation for all temperatures below the melting points of AlN and ScN.
Keyword
- NATURAL SCIENCES
- NATURVETENSKAP
Publication and Content Type
- ref (subject category)
- art (subject category)
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