Incommensurate charge-density-wave state in. alpha. -uranium: A high-resolution x-ray and neutron-scattering study

Journal Article · Mon Apr 15 04:00:00 EDT 1991 · Physical Review, B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.43.8803· OSTI ID:5493526

Gruebel, G; Axe, J D; Gibbs, D ^[1]; Lander, G H ^[2]; Marmeggi, J C ^[3]; Brueckel, T ^[4]

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1. Brookhaven National Laboratory, Upton, New York 11973 (USA)
2. Commission of the European Communities, Joint Research Center, Postfach 2340, D-7500 Karlsruhe, Federal Republic of Germany (DE) Institute for Transuranium Elements, Postfach 2340, D-7500 Karlsruhe, Federal Republic of Germany (DE)
3. Laboratoire de Cristallographie, Centre National de la Recherche Scientifique, Associe a l'Universite J. Fourier, 166X, F-38042 Grenoble, France (FR)
4. Institut Laue Langevin, 156X, F-38042 Grenoble, France (FR)

The incommensurate charge-density-wave state, which develops in {alpha}-uranium below 47 K, was studied in high-resolution x-ray and neutron-scattering experiments. Lock-in transitions of the incommensurate modulation wave vector were observed at 38 K ({ital q}{sub {ital x}}=1/2) and 22 K ({ital q}{sub {ital y}}=1/6,{ital q}{sub {ital z}}= 2) / 11 ) and explained in terms of a Landau theory. The simultaneous lock-in transformation of both the {ital q}{sub {ital y}} and {ital q}{sub {ital z}} components is accompanied by the formation of a phase-discommensuration lattice along the {ital z} axis.

• DOE Contract Number: AC02-76CH00016
• OSTI ID: 5493526
• Journal Information: Physical Review, B: Condensed Matter; (USA), Journal Name: Physical Review, B: Condensed Matter; (USA) Vol. 43:11; ISSN PRBMD; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ACTINIDES
COHERENT SCATTERING
CRYSTALS
DIFFRACTION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
METALS
MONOCRYSTALS
NEUTRON DIFFRACTION
PHYSICAL PROPERTIES
SCATTERING
URANIUM
URANIUM-ALPHA
VERY LOW TEMPERATURE
X-RAY DIFFRACTION