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Spin-lattice coupling in multiferroic Pb(Fe1/2Nb1/2)O3 thin films

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10 Author(s)
Peng, Wei ; Laboratoire de Physique de la Matière Condensée, Université de Picardie Jules Verne, 33 rue Saint Leu, 80039 Amiens, France ; Lemee, Nathalie ; Karkut, Michael ; Dkhil, Brahim
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We made magnetization and x-ray diffraction measurements on an epitaxial Pb(Fe1/2Nb1/2)O3 200 nm film. From the temperature dependence of the out-of-plane lattice parameter, we can assign a Burns’ temperature at Td∼640 K, a temperature at T*∼510 K (related to the appearance of static polar nanoregions), and an anomaly occurring at 200 K. The latter is precisely the Néel temperature TN determined from magnetization and points to spin-lattice coupling at TN∼200 K. We also observe “weak ferromagnetism” up to 300 K and propose superantiferromagnetic clusters as a plausible scenario to explain this hysteresis above TN.

Published in:

Applied Physics Letters  (Volume:94 ,  Issue: 1 )

Date of Publication:

Jan 2009

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