Abstract
Dielectric dispersion was observed in a single crystal with the composition of ErFe2O3.95 below magnetic transition temperature. It is characterized by a large dielectric constant of the order of 104, and a Debye-type frequency dependence like in the poly crystalline samples of the same substance which we reported in a previous paper. Large anisotropy exists in the strength εs − ε∞ and the characteristic relaxation frequency of the dispersion. The strength is higher within the c-plane than along the c-axis, while the characteristic frequency is much larger along the c-axis than within the c-plane. The dielectric dispersion in the polycrystalline sample cannot be explained by a simple average of the single crystal results. The observed dispersion is qualitatively discussed with a model of domain wall motion on an assumption that ErFe2O4 is a polar crystal.
Original language | English |
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Pages (from-to) | 1371-1377 |
Number of pages | 7 |
Journal | journal of the physical society of japan |
Volume | 64 |
Issue number | 4 |
DOIs | |
Publication status | Published - Apr 1995 |
Externally published | Yes |
Keywords
- ErFeO
- RFeO
- Verwey transition
- dielectric relaxation
- ferroelectric domain
- magnetic domain
ASJC Scopus subject areas
- Physics and Astronomy(all)