Encapsulation-induced stabilization of dimensionally restricted metallic alloy wires

Compositionally modulated CuNiFe alloys wires were grown on sapphire substrates in two dimensionally restricted configurations, the first by dewetting thin films on crystallographically faceted free surfaces and the second by enclosure within lithographically sculpted cavities. Samples were annealed...

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Bibliographic Details
Published in:Acta materialia 2010-09, Vol.58 (16), p.5332-5341
Main Authors: Sugar, Joshua D., McKeown, Joseph T., Radmilovic, Velimir, Glaeser, Andreas M., Gronsky, Ronald
Format: Article
Language:English
Subjects:
Annealing
Applied sciences
Capillary phenomena
Crystallography
Dewetting
Encapsulation
Energy filtered transmission electron microscopy
Exact sciences and technology
Instability
Iron compounds
Low energy
Metals. Metallurgy
Spinodal decomposition
Thin films
Transmission electron microscopy
Wetting
Wire
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Summary:Compositionally modulated CuNiFe alloys wires were grown on sapphire substrates in two dimensionally restricted configurations, the first by dewetting thin films on crystallographically faceted free surfaces and the second by enclosure within lithographically sculpted cavities. Samples were annealed at elevated temperature to promote evolution towards chemical and morphological equilibrium. Surface wires of limited length resulted from the break-up of thin films along the long axes of substrate facets. Encapsulated wires oriented along specific crystallographic directions developed stable low energy facets along their lengths and resisted both dewetting and Rayleigh instabilities, enabling fabrication of stable, oriented, modulated (Cu/NiFe) structures.
ISSN:1359-6454
1873-2453
DOI:10.1016/j.actamat.2010.06.008