X-ray and neutron scattering

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An X-ray and Neutron Scattering Study of the Structure of Zinc Vanadate Glasses

Zeitschrift für Naturforschung A De Gruyter 56:6-7 (2001) 478-488

Authors:

Uwe Hoppe, Rainer Kranold, Emil Gattef, Jörg Neuefeind, David A Keen
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Coupled magnetic excitations in single crystal PrBa(2)Cu(3)O(6.2).

Phys Rev Lett 86:26 Pt 1 (2001) 5994-5997

Authors:

SJ Lister, AT Boothroyd, NH Andersen, BH Larsen, AA Zhokhov, AN Christensen, AR Wildes

Abstract:

The dispersion of the low-energy magnetic excitations of the Pr sublattice in PrBa(2)Cu(3)O(6.2) is determined by inelastic neutron scattering measurements on a single crystal. The dispersion, which shows the effect of interactions with the Cu spin waves, is well described by a model of the coupled Cu-Pr magnetic system. This model enables values for the principal exchange constants to be determined. The results suggest that both Pr-Pr and Cu-Pr interactions are important in producing the anomalously high ordering temperature of the Pr sublattice. Measurements of the Cu optic spin wave mode show that the interlayer Cu-Cu exchange is significantly lower than in YBa(2)Cu(3)O(6.2).
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Structural characterization of further high temperature superionic phases of Ag2HgI4 and Cu2HgI4

Journal of Physics Condensed Matter IOP Publishing 13:24 (2001) 5597

Authors:

S Hull, DA Keen
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Coupled Magnetic Excitations in Single Crystal PrBa2Cu3O6.2

(2001)

Authors:

SJS Lister, AT Boothroyd, NH Andersen, BH Larsen, AA Zhokhov, AN Christensen, AR Wildes
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Structural behaviour at the γ-β phase transition of Ag3SI

Journal of Physics Condensed Matter IOP Publishing 13:18 (2001) l343

Authors:

DA Keen, S Hull
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