New magnetic phase transitions in BiFeO3

Singh, M. K. and Katiyar, R. S. and Scott, J. F. (2008) New magnetic phase transitions in BiFeO3. Journal of Physics: Condensed Matter, 20 (25). p. 252203. DOI 10.1088/0953-8984/20/25/252203

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Abstract

We observed Raman scattering from magnons in the frequency range from 10 to 65 cm[?]1 in BiFeO3 single crystals at cryogenic temperatures; the temperature dependence of the magnon frequency at 18.2 cm[?]1 approximates an S = 5/2 Brillouin function up to the temperature ([?]280 K) at which the magnon becomes overdamped. The diverging cross section and the frequency shift at [?]140 and [?]200 K implies a spin-reorientation transition as in orthoferrites.

Item Type: Article
Uncontrolled Keywords: 08AREP; IA57;
Subjects: 03 - Mineral Sciences
Divisions: 03 - Mineral Sciences
Journal or Publication Title: Journal of Physics: Condensed Matter
Volume: 20
Page Range: p. 252203
Identification Number: 10.1088/0953-8984/20/25/252203
Depositing User: Sarah Humbert
Date Deposited: 30 May 2009 11:44
Last Modified: 23 Jul 2013 09:55
URI: http://eprints.esc.cam.ac.uk/id/eprint/1046

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