Published April 2009
| Version v1
Journal article
Ferroelectricity from ordering of Fe valences in the rare-earth ion oxides RFe2O4 (R=Y, Ho-Lu)
- 1. Japan Atomic Energy Agency, Quantum Beam Science Directorate, Sayo, Hyogo (Japan)
- 2. Okayama Univ., Faculty of Science, Okayama (Japan)
- 3. Osaka Prefecture Univ., Graduate School of Science, Sakai, Osaka (Japan)
- 4. Osaka Prefecture Univ., Graduate School of Engineering, Sakai, Osaka (Japan)
Description
The rare-earth iron oxides RFe2O4 (R=Y, Ho-Lu) have a rhombohedral crystal structure, consisting of an alternating stacking of triangular lattices of R, Fe and O ions. Recently, we have proposed that this system shows a new mechanism of ferroelectricity; the ferroelectric state originates from a polar charge-ordered structure of Fe2+ and Fe3+ on a triangular lattice. In this article, a review is given on the details of this ferroelectricity, which were revealed by measurements of synchrotron X-ray diffraction and dielectric properties of one of the RFe2O4 oxides, LuFe2O4. (author)
Additional details
Publishing Information
- Journal Title
- Nippon Kessho Gakkai-Shi
- Journal Volume
- 51
- Journal Issue
- 2
- Journal Page Range
- p. 162-168
- ISSN
- 0369-4585
INIS
- Country of Publication
- Japan
- Country of Input or Organization
- Japan
- INIS RN
- 41014941
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Descriptors DEI
- ABSORPTION SPECTROSCOPY; ANTIFERROMAGNETISM; CRYSTAL-PHASE TRANSFORMATIONS; DIELECTRIC PROPERTIES; DOMAIN STRUCTURE; ELECTRIC DIPOLES; ELECTRIC FIELDS; FERROELECTRIC MATERIALS; FLUCTUATIONS; FREQUENCY DEPENDENCE; IRON COMPOUNDS; IRON IONS; MOESSBAUER EFFECT; OXIDES; POLARIZATION; RARE EARTH COMPOUNDS; SUPERLATTICES; SYNCHROTRON RADIATION; TEMPERATURE DEPENDENCE; TRIGONAL LATTICES; VALENCE; X-RAY DIFFRACTION; X-RAY SPECTROSCOPY
- Descriptors DEC
- BREMSSTRAHLUNG; CHALCOGENIDES; CHARGED PARTICLES; COHERENT SCATTERING; CRYSTAL LATTICES; CRYSTAL STRUCTURE; DIELECTRIC MATERIALS; DIFFRACTION; DIPOLES; ELECTRICAL PROPERTIES; ELECTROMAGNETIC RADIATION; IONS; MAGNETISM; MATERIALS; MULTIPOLES; OXYGEN COMPOUNDS; PHASE TRANSFORMATIONS; PHYSICAL PROPERTIES; RADIATIONS; SCATTERING; SPECTROSCOPY; TRANSITION ELEMENT COMPOUNDS; VARIATIONS
Optional Information
- Notes
- 25 refs., 8 figs.