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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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Neutron total scattering method: simultaneous determination of long-range and short-range order in disordered materials

European Journal of Mineralogy Schweizerbart 14:2 (2002) 331-348

Authors:

Martin T Dove, Matthew G Tucker, David A Keen
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Structural description of the superionic behaviour in the system (AgI)x–(PbI2)1−x, 2/3≤x≤4/5

Solid State Ionics Elsevier 147:1-2 (2002) 97-106

Authors:

S Hull, DA Keen, P Berastegui
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Comments on quasicrystalline phases and examples of quasicrystalline phase nomenclature in "Nomenclature of magnetic, incommensurate, composition-changed morphotropic, polytype, transient-structural and quasicrystalline phases undergoing phase transitions. II. Report of an IUCr Working Group on Phase Transition Nomenclature" by J.-C. Tolédano et al. (2001). Acta Cryst. A57, 614-626.

Acta crystallographica. Section A, Foundations of crystallography 58:Pt 2 (2002) 209
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