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Dielectric anomaly and magnetic response of epitaxial orthorhombic YMnO3 thin films
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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.
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MARTÍ, X., et al. Dielectric anomaly and magnetic response of epitaxial orthorhombic YMnO3 thin films. Journal of Materials Research. 2007. Vol. 22, num. 8, pags. 2096-2101. ISSN 0884-2914. [consulted: 9 of August of 2026]. Available at: https://hdl.handle.net/2445/18209