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Neutron diffraction study of the coupling between spin, lattice, and structural degrees of freedom in 0.8BiFeO(3)-0.2PbTiO(3)

Ranjan, Rajeev and Kothai, V and Senyshyn, Anatoliy and Boysen, Hans (2011) Neutron diffraction study of the coupling between spin, lattice, and structural degrees of freedom in 0.8BiFeO(3)-0.2PbTiO(3). In: Journal of Applied Physics, 109 (6).

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Abstract

A powder neutron diffraction study was carried out on 0.8BiFeO(3)-0.2PbTiO(3) in the temperature range 27-1000 degrees C. The system exhibits magnetic transition at similar to 300 degrees C and a rhombohedral (R3c)-cubic (Pm3m) ferroelectric phase transition at similar to 650 degrees C. Anomalous variation in the lattice parameters and the octahedral tilt angle is observed across the magnetic transition temperature. In the magnetic phase, the c parameter is contracted and the octahedral tilt angle is slightly increased. The results suggest coupling between the spin, lattice and structural degrees of freedom. (C) 2011 American Institute of Physics. doi:10.1063/1.3555093]

Item Type: Journal Article
Additional Information: Copyright of this article belongs to American Institute of Physics.
Keywords: ferroelectric transitions;lattice constants;magnetic transitions;neutron diffraction
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 27 Apr 2011 05:19
Last Modified: 28 Oct 2011 10:07
URI: http://eprints.iisc.ernet.in/id/eprint/37155

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