Phenomenological theory of icosahedral incommensurate (''quasiperiodic'') order in Mn-Al alloys

Journal Article · Sun Apr 07 23:00:00 EST 1985 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.54.1517· OSTI ID:5896704

Bak, P

The crystal structure with icosahedral point-group symmetry and long-range orientational order observed by Shechtman et al. in Mn-Al alloys can be explained as a multiple-q density-wave structure with only one length scale. Its existence and stability can be understood from a simple Landau theory. The diffraction spots can be indexed by six- (or more-) dimensional space-group symmetries. Icosahedral incommensurate structures constitute natural extensions of smectic, rodlike, and cubic crystal structures.

• Research Organization: Department of Physics, Brookhaven National Laboratory, Upton, New York 11973
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 5896704
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 54:14; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
ALLOYS
ALUMINIUM ALLOYS
BCC LATTICES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CUBIC LATTICES
DISTANCE
ENERGY
FREE ENERGY
INTERACTION RANGE
ISOTROPY
MANGANESE ALLOYS
ORDER PARAMETERS
PHASE STUDIES
PHONONS
PHYSICAL PROPERTIES
QUASI PARTICLES
RODS
SYMMETRY
THERMODYNAMIC PROPERTIES