X-ray and neutron scattering

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Estimation of the compressibility of Na0.5Bi0.5TiO3 and related perovskite-type titanates

JOURNAL OF PHYSICS-CONDENSED MATTER 12:46 (2000) 9689-9698

Authors:

J Kreisel, AM Glazer
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X-ray diffraction, micro-Raman and birefringence imaging of silicon carbide

MATER SCI FORUM 353-3 (2000) 283-286

Authors:

E Pernot, M Mermoux, J Kreisel, O Chaix-Pluchery, P Pernot-Rejmankova, M Anikin, B Pelissier, AM Glazer, R Madar

Abstract:

Transmission and reflection X-ray topography, birefringence imaging and Raman spectroscopy imaging have been performed on a silicon carbide slice. The differences between the images and the information obtained fr-om them are discussed in detail.
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X-ray-scattering study of copper magnetism in nonsuperconducting PrBa2Cu3O6.92

PHYSICAL REVIEW B 61:2 (2000) 1251-1255

Authors:

JP Hill, DF McMorrow, AT Boothroyd, A Stunault, C Vettier, LE Berman, M von Zimmermann, T Wolf
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Local structures of amorphous and crystalline phases of silica, SiO2, by neutron total scattering

Journal of Physics Condensed Matter IOP Publishing 11:47 (1999) 9263

Authors:

David A Keen, Martin T Dove
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Incommensurate magnetism in non-superconducting PrBa2Cu3O6.92

PHYSICA C 318 (1999) 292-298

Authors:

AT Boothroyd, JP Hill, DF McMorrow, NH Andersen, A Stunault, C Vettier, T Wolf

Abstract:

We report the discovery of incommensurate magnetic order in non-superconducting single crystals PrBa2Cu3O6.92. Resonant X-ray magnetic scattering at the Pr L-II and L-III edges and high resolution neutron diffraction were used to characterise the magnetic order on the different magnetic sublattices. The data reveal that the Pr sublattice orders at a temperature of 19 K in an incommensurate structure with ordering wavevector (0.5 +/- delta, 0.5, 0) or (0.5, 0.5 +/- delta, 0), delta approximate to 0.006-0.008, A spin reorientation in the Pr sublattice to a commensurate antiferromagnetic structure with ordering wavevector (0.5, 0.5, 0.5) takes place at a temperature close to 9 K. (C) 1999 Elsevier Science B.V. All rights reserved.
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