Ferroelectricity and weak ferromagnetism of hexagonal ErFe O3 thin films

Hiroko Yokota, Tomoya Nozue, Shin Nakamura, Hajime Hojo, Mamoru Fukunaga, Pierre Eymeric Janolin, Jean Michel Kiat, Akio Fuwa

    Research output: Contribution to journalArticle

    10 Citations (Scopus)

    Abstract

    Hexagonal ErFeO3 thin films fabricated by a pulsed laser deposition method were investigated by x-ray diffraction (XRD) and transmission electron microscopy. No structural phase transition was observed between 20 and 900 K. Ferroelectric D-E hysteresis loops were obtained at room temperature using the double-wave method, and the magnitude of spontaneous polarization was determined to be 200nC/cm2. The existence of superlattice reflections in the XRD indicates that the space group of ErFeO3 thin film is the polar hexagonal P63cm. This result also supports the ferroelectricity at room temperature. Magnetic properties were examined by a superconducting quantum interference device and Mössbauer spectroscopy. Below the Néel temperature of 120 K (TN), a weak ferromagnetism appears along the c axis due to the canting of Fe3+ magnetic moments. Around TN, the imaginary part of dielectric constant shows an anomaly. These results prove h-ErFeO3 thin films to be multiferroic below 120 K.

    Original languageEnglish
    Article number054101
    JournalPhysical Review B - Condensed Matter and Materials Physics
    Volume92
    Issue number5
    DOIs
    Publication statusPublished - 2015 Aug 3

      Fingerprint

    ASJC Scopus subject areas

    • Condensed Matter Physics
    • Electronic, Optical and Magnetic Materials

    Cite this

    Yokota, H., Nozue, T., Nakamura, S., Hojo, H., Fukunaga, M., Janolin, P. E., Kiat, J. M., & Fuwa, A. (2015). Ferroelectricity and weak ferromagnetism of hexagonal ErFe O3 thin films. Physical Review B - Condensed Matter and Materials Physics, 92(5), [054101]. https://doi.org/10.1103/PhysRevB.92.054101