Influence of growth ambience and doping on the structural properties of multiferroic DyMnO3

Nair, Harikrishnan S and Elizabeth, Suja (2012) Influence of growth ambience and doping on the structural properties of multiferroic DyMnO3. In: JOURNAL OF CRYSTAL GROWTH, 362 . pp. 24-28.

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Abstract

We report on the single crystal growth of 50% Sr and Y doped multiferroic DyMnO3 using optical floating zone technique. A comparison of the effect of growth ambience and of chemical substitution on the crystal structure of DyMnO3 is attempted. It is observed that DyMnO3 adopts Pm3m cubic structure with 50% Sr doping whereas with 50% Y doping, the crystal structure is hexagonal P6(3)cm. Orthorhombic Pnma structure is adopted by DyMnO3 when grown in air, whereas hexagonal P6(3)cm structure is obtained when grown under the ambience of argon. The structural polymorphism is discussed in terms of difference in ionic sizes of Sr, Y and Dy, comparable Gibbs free energies and coordination schemes of surrounding oxygens for hexagonal and orthorhombic structures of DyMnO3. (C) 2012 Elsevier B.V. All rights reserved.

Item Type:	Journal Article
Publication:	JOURNAL OF CRYSTAL GROWTH
Publisher:	ELSEVIER SCIENCE BV
Additional Information:	Copyright for this article belongs to ELSEVIER SCIENCE BV, NETHERLANDS
Keywords:	X-ray diffraction;Floating zone technique;Manganites
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	02 Jan 2013 11:20
Last Modified:	02 Jan 2013 11:20
URI:	http://eprints.iisc.ac.in/id/eprint/45571

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