| Numéro |
J. Phys. IV France
Volume 07, Numéro C1, Mars 1997
7th INTERNATIONAL CONFERENCE ON FERRITES
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|---|---|---|
| Page(s) | C1-365 - C1-366 | |
| DOI | https://doi.org/10.1051/jp4:19971149 | |
7th INTERNATIONAL CONFERENCE ON FERRITES
J. Phys. IV France 07 (1997) C1-365-C1-366
DOI: 10.1051/jp4:19971149
1 Department of Physics, Waseda University, Shinjuku-ku, Tokyo 169, Japan
2 Institute for Solid State Physics, University of Tokyo, Minato-ku, Tokyo 106, Japan
© EDP Sciences 1997
J. Phys. IV France 07 (1997) C1-365-C1-366
DOI: 10.1051/jp4:19971149
Ferroelectricity of Europium Manganese Oxide EuMn2O5 with Helimagnetic Ordering
H. Nakamura1, M. Ishikawa1, K. Kohn1 and M. Ishikawa21 Department of Physics, Waseda University, Shinjuku-ku, Tokyo 169, Japan
2 Institute for Solid State Physics, University of Tokyo, Minato-ku, Tokyo 106, Japan
Abstract
From the measurements of pyroelectricity, dielectric constant, magnetic susceptibility and specific heat, we conclude that EuMn2O5 is ferroelectric below the Curie temperature TC of 38.6 K. This temperature coincides with the Néel temperature of the helimagnetic ordering of Mn3+ and Mn4+ moments within the accuracy of the measurements. The spontaneous polarization is along the b-direction.
© EDP Sciences 1997