The stability of the epitaxially introduced metastable metallic structures of thin layers and multilayers

Conference · Sat Dec 31 00:00:00 EST 1994

OSTI ID:72425

Cadeville, M C ^[1]

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1. Univ. Louis Pasteur, Strasbourg (France). Inst. de Physique et Chimie des Materiaux de Strasbourg

Among the very large number of metallic thin films, sandwiches and multilayers which have been elaborated by epitaxy on various single crystalline substrates during the last decade, few new structures are reported. Limiting to the case of 3d metals, one finds with a great confidence bcc Cobalt, possibly bee Nickel and a non-compact hexagonal (hp) iron. Moreover structures existing at high temperature under ambient pressure are epitaxially stabilized at room temperature (RT) like fcc Cobalt, fcc Iron, fcc and bcc Manganese. The hcp iron which is stable under high pressure at RT would not be epitaxially stabilized at ambient pressure conversely to first findings. The critical thickness of the metastable phase is generally limited to some monolayers in thin films, being slightly increased in sandwiches or multilayers, even if the phenomenological wetting criterion to build superlattices is not satisfied. No increased magnetic moment has been found up to now in the expanded lattices, contrary to band structure calculation predictions. 56 refs.

• OSTI ID: 72425
• Report Number(s): CONF-9310224-; ISBN 0-87339-249-3; TRN: IM9530%%37
• Resource Relation: Conference: Materials Week `93, Pittsburgh, PA (United States), 17-21 Oct 1993; Other Information: PBD: 1994; Related Information: Is Part Of Alloy modeling and design; Stocks, G.M. [ed.] [Oak Ridge National Lab., Oak Ridge, TN (United States). Metals and Ceramics Div.]; Turchi, P.E.A. [ed.] [Lawrence Livermore National Lab., Livermore, CA (United States)]; PB: 334 p.
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COBALT
PHASE STABILITY
IRON
NICKEL
MANGANESE
EPITAXY
PHASE DIAGRAMS
THIN FILMS
FERROMAGNETIC MATERIALS
MAGNETIC PROPERTIES
METASTABLE STATES
SUBSTRATES
X-RAY DIFFRACTION
AUGER ELECTRON SPECTROSCOPY
ELECTRON DIFFRACTION
ELECTRON MICROSCOPY
THICKNESS
FCC LATTICES
BCC LATTICES
HEXAGONAL LATTICES