A Raman study of multiferroic LuMnO3

Ghosh, Anirban and Sahu, Jyoti Ranjan and Bhat, S Venkataprasad and Rao, CNR (2009) A Raman study of multiferroic LuMnO3. In: Solid State Sciences, 11 (9). pp. 1639-1642.

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Abstract

Magnetic and dielectric measurements confirm the multiferroic nature of LuMnO3. Raman spectra of LuMnO3 have been recorded in the 77-800 K range covering both the antiferromagnetic transition at 90 K and the ferroelectric-paraelectric transition at 750 K. The changes in the phonon modes frequencies and band-widths indicate the presence of phonon-spin coupling in the antiferromagnetically ordered phase. The ferroelectric-paraelectric transition is accompanied by the broadening and disappearance of many of the phonon modes. Some of the phonon modes also show anomalies at the ferroelectric transition.

Item Type:	Journal Article
Publication:	Solid State Sciences
Publisher:	Elsevier Science
Additional Information:	Copyright of this article belongs to Elsevier, 2009.
Keywords:	Multiferroics; Raman spectroscopy; LuMnO3; Phonons; Hexagonal manganites
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	06 Jan 2010 10:27
Last Modified:	19 Sep 2010 05:49
URI:	http://eprints.iisc.ac.in/id/eprint/24205

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