X-ray and neutron scattering

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Phase transitions in perovskite-type relaxor ferroelectrics

Acta Crystallographica Section A: Foundations and advances International Union of Crystallography (IUCr) 58:s1 (2002) c249-c249

Authors:

J Kreisel, P Bouvier, PA Thomas, AM Glazer
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Spin dynamics in stripe-ordered La5/3Sr1/3NiO4

(2002)

Authors:

AT Boothroyd, D Prabhakaran, PG Freeman, SJS Lister, M Enderle, A Hiess, J Kulda
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Crystal Structures and Ionic Conductivities of Ternary Derivatives of the Silver and Copper Monohalides I. Superionic Phases of Stoichiometry MA4I5:RbAg4I5, KAg4I5, and KCu4I5

Journal of Solid State Chemistry Elsevier 165:2 (2002) 363-371

Authors:

S Hull, DA Keen, DS Sivia, P Berastegui
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Growth of large La1-xSrxMnO3 single crystals under argon pressure by the floating-zone technique

J CRYST GROWTH 237 (2002) 806-809

Authors:

D Prabhakaran, AI Coldea, AT Boothroyd, S Blundell

Abstract:

We report the growth of single crystals of La1-xSrxMnO3 (x = 0.0-0.3) by the floating-zone technique in an image furnace under high argon pressure (6-8 atm). Ail excess of Mn in the polycrystalline starting material was used to compensate for the evaporation during growth. single crystals of diameter 8 mm and length 70 mm have been obtained. The phase purity, composition and quality of the crystals were analysed by X-ray diffraction and electron probe microanalysis. We discuss the effect on the crystal growth of varying the amount of Mn excess and of the composition of the growth atmosphere. We also present magnetization and resistivity data for a few of the samples. (C) 2002 Elsevier Science B.V. All rights reserved.
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Growth of large La2-xSrxNiO4+delta single crystals by the floating-zone technique

J CRYST GROWTH 237 (2002) 815-819

Authors:

D Prabhakaran, P Isla, AT Boothroyd

Abstract:

We report on an investigation into the growth of large, high-quality single crystals of La2-xSrxNiO4+ (x = 0-0.5) by the floating zone technique. The results of attempts to grow crystals in different atmospheres are discussed. The oxygen non-stoichiometry (delta) of the as-grown crystals is found to decrease with the Sr substitution level. Magnetic and electrical transport measurements on the crystals are reported. (C) 2002 Elsevier Science B.V. All rights reserved.
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