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

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 nanoregio...

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Bibliographic Details
Published in:Applied physics letters 2009, Vol.94 (1)
Main Authors: Peng, Wei, Lemée, Nathalie, Karkut, Michael, Dkhil, Brahim, Shvartsman, Vladimir V., Borisov, Pavel, Kleemann, Wolfgang, Holc, Janez, Kosec, Marija, Blinc, Robert
Format: Article
Language:English
Subjects:
Condensed Matter
Materials Science
Physics
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Summary: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.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.3067872