Abstract
The charge ordering process of a mixed valence LuFe2O4 system has been studied, focusing attention on the frustration effect associated with the charge configuration, ft is revealed that the system undergoes successive phase transitions following the sequence of disorder→2D CDW→3D CDW. In the 2D-CDW state, the charge density wave defined by the wave vector (1/3,1/3), is formed in the hexagonal layer. On the nodal lines of the CDW, the charge order is still undetermined due to the charge frustration. From a dielectric viewpoint, this phase is viewed as random stacking of 2D ferroelectric layers. In the 3D-CDW state, antiphase stacking of the 2D ordered layer develops. At the same time, the in-plane charge order exhibits a doubly modulated long-period structure. From a dielectric viewpoint, this phase is characterized by an incommensurate antiferroelectric phase. Relevance of the charge ordering mechanism to the observed anomalously large dielectric constant in LuFe2O4 is discussed.
| Original language | English |
|---|---|
| Pages (from-to) | 3733-3736 |
| Number of pages | 4 |
| Journal | Journal of the Physical Society of Japan |
| Volume | 66 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - 1997 |
| Externally published | Yes |
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Keywords
- charge frustration
- charge transfer dielectricity
- LuFeO
- mixed valence system
- phase transition
- RFeO
ASJC Scopus subject areas
- Physics and Astronomy(all)
Cite this
Incommensurate Charge Ordering in Charge-Frustrated LuFe2O4 System. / Yamada, Yasusada; Nohdo, Shinichiro; Ikeda, Naoshi.
In: Journal of the Physical Society of Japan, Vol. 66, No. 12, 1997, p. 3733-3736.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Incommensurate Charge Ordering in Charge-Frustrated LuFe2O4 System
AU - Yamada, Yasusada
AU - Nohdo, Shinichiro
AU - Ikeda, Naoshi
PY - 1997
Y1 - 1997
N2 - The charge ordering process of a mixed valence LuFe2O4 system has been studied, focusing attention on the frustration effect associated with the charge configuration, ft is revealed that the system undergoes successive phase transitions following the sequence of disorder→2D CDW→3D CDW. In the 2D-CDW state, the charge density wave defined by the wave vector (1/3,1/3), is formed in the hexagonal layer. On the nodal lines of the CDW, the charge order is still undetermined due to the charge frustration. From a dielectric viewpoint, this phase is viewed as random stacking of 2D ferroelectric layers. In the 3D-CDW state, antiphase stacking of the 2D ordered layer develops. At the same time, the in-plane charge order exhibits a doubly modulated long-period structure. From a dielectric viewpoint, this phase is characterized by an incommensurate antiferroelectric phase. Relevance of the charge ordering mechanism to the observed anomalously large dielectric constant in LuFe2O4 is discussed.
AB - The charge ordering process of a mixed valence LuFe2O4 system has been studied, focusing attention on the frustration effect associated with the charge configuration, ft is revealed that the system undergoes successive phase transitions following the sequence of disorder→2D CDW→3D CDW. In the 2D-CDW state, the charge density wave defined by the wave vector (1/3,1/3), is formed in the hexagonal layer. On the nodal lines of the CDW, the charge order is still undetermined due to the charge frustration. From a dielectric viewpoint, this phase is viewed as random stacking of 2D ferroelectric layers. In the 3D-CDW state, antiphase stacking of the 2D ordered layer develops. At the same time, the in-plane charge order exhibits a doubly modulated long-period structure. From a dielectric viewpoint, this phase is characterized by an incommensurate antiferroelectric phase. Relevance of the charge ordering mechanism to the observed anomalously large dielectric constant in LuFe2O4 is discussed.
KW - charge frustration
KW - charge transfer dielectricity
KW - LuFeO
KW - mixed valence system
KW - phase transition
KW - RFeO
UR - http://www.scopus.com/inward/record.url?scp=21944436810&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=21944436810&partnerID=8YFLogxK
U2 - 10.1143/JPSJ.66.3733
DO - 10.1143/JPSJ.66.3733
M3 - Article
AN - SCOPUS:21944436810
VL - 66
SP - 3733
EP - 3736
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 12
ER -