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Dielectric anomaly and magnetic response of epitaxial orthorhombic YMnO3 thin films
Martí, X.; Skumryev, Vassil Hristov; Laukhin, Vladimir; Sánchez Barrera, Florencio; García-Cuenca Varona, María Victoria; Ferrater Martorell, Cèsar; Varela Fernández, Manuel, 1956-; Fontcuberta i Griñó, Josep
Universitat de Barcelona
The structure, magnetic response, and dielectric response of the grown epitaxial thin films of the orthorhombic phase of YMnO3 oxide on Nb:SrTiO3 (001) substrates have been measured. We have found that a substrate-induced strain produces an in-plane compression of the YMnO3 unit cell. The magnetization versus temperature curves display a significant zero-field cooling (ZFC)-field cooling hysteresis below the Nel temperature (TN 45 K). The dielectric constant increases gradually (up to 26%) below the TN and mimics the ZFC magnetization curve. We argue that these effects could be a manifestation of magnetoelectric coupling in YMnO3 thin films and that the magnetic structure of YMnO3 can be controlled by substrate selection and/or growth conditions.
2011-07-26
Pel·lícules fines
Òxids
Propietats magnètiques
Dielèctrics
Thin films
Oxides
Magnetic properties
Dielectrics
(c) Materials Research Society, 2007
Article
Materials Research Society
         

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Laukhin, Vladimir; Skumryev, Vassil Hristov; Martí, X.; Hrabovsky, D.; Sánchez Barrera, Florencio; García-Cuenca Varona, María Victoria; Ferrater Martorell, Cèsar; Varela Fernández, Manuel, 1956-; Lüders, R.; Bobo, J. F.; Fontcuberta i Griñó, Josep
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