Origin of the large polarization in multiferroic YMnO 3 thin films revealed by soft- and hard-x-ray diffraction

H. Wadati, J. Okamoto, M. Garganourakis, V. Scagnoli, U. Staub, Y. Yamasaki, H. Nakao, Y. Murakami, M. Mochizuki, M. Nakamura, M. Kawasaki, Y. Tokura

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Abstract

We investigated the magnetic structure of an orthorhombic YMnO 3 thin film by resonant soft x-ray and hard x-ray diffraction. We observed a temperature-dependent incommensurate magnetic reflection below 45 K and a commensurate lattice-distortion reflection below 35 K. These results demonstrate that the ground state is composed of coexisting E-type and cycloidal states. Their different ordering temperatures clarify the origin of the large polarization to be caused by the E-type antiferromagnetic states in the orthorhombic YMnO 3 thin film.

Original languageEnglish
Article number047203
JournalPhysical Review Letters
Volume108
Issue number4
DOIs
Publication statusPublished - 2012 Jan 24
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Wadati, H., Okamoto, J., Garganourakis, M., Scagnoli, V., Staub, U., Yamasaki, Y., Nakao, H., Murakami, Y., Mochizuki, M., Nakamura, M., Kawasaki, M., & Tokura, Y. (2012). Origin of the large polarization in multiferroic YMnO 3 thin films revealed by soft- and hard-x-ray diffraction. Physical Review Letters, 108(4), [047203]. https://doi.org/10.1103/PhysRevLett.108.047203