Abstract
We have studied magnetic orderings of a ferroelectric TmMn 2O5 by single-crystal neutron diffraction and dielectric measurements. Below TN1 = 44 K, TmMn2O5 shows the sequence of magnetic phase transitions at T = 36.4, 35.1 and 24.9 K, associated with changes in the magnetic propagation vector q = (qx, 0, qz). Such magnetic phase transitions are quite similar to those of YMn2O5 with non-magnetic Y ion reported previously. In addition, we observed another magnetic phase transition at T = 4.8 K which implies a dramatic reorientation of Mn moments induced by the rare-earth Tm moment. The agreement between the temperatures of the magnetic and ferroelectric phase transitions indicates that the ferroelectric ordering is strongly correlated with the magnetic ordering.
Original language | English |
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Pages (from-to) | 468-472 |
Number of pages | 5 |
Journal | journal of the physical society of japan |
Volume | 74 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2005 Jan |
Keywords
- Dielectric constant
- Ferroelectricity
- Magnetic ordering
- Multiferroic
- Neutron diffraction
- TmMnO
ASJC Scopus subject areas
- Physics and Astronomy(all)