Ferroelectricity of Europium Manganese Oxide EuMn2O5 with Helimagnetic Ordering H. Nakamura, K. Kohn et M. IshikawaJ. Phys. IV France, 07 C1 (1997) C1-365-C1-366DOI: https://doi.org/10.1051/jp4:19971149
