Charge Ordering in the Geometrically Frustrated Spinel AlV2O4

Ken Ichiro Matsuno; Takuro Katsufuji; Shigeo Mori; Yutaka Moritomo; Akihiko Machida; Eiji Nishibori; Masaki Takata; Makoto Sakata; Naoki Yamamoto; Hidenori Takagi

doi:10.1143/JPSJ.70.1456

Charge Ordering in the Geometrically Frustrated Spinel AlV₂O₄

Ken Ichiro Matsuno, Takuro Katsufuji, Shigeo Mori, Yutaka Moritomo, Akihiko Machida, Eiji Nishibori, Masaki Takata, Makoto Sakata, Naoki Yamamoto, Hidenori Takagi

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86 Citations (Scopus)

Abstract

We have found that spinel AlV₂O₄ shows a phase transition at ∼700K with anomalies of transport and magnetic properties. It is clarified that this corresponds to a charge-ordering transition, where the V^2.5+ ions are separated into three V^2.5-δ ions and one V^2.5+3δ ion. This three-one type of charge ordering, which is coupled with rhombohedral distortion along the (111) axis, reduces the high degeneracy of ground states inherent in this spinel structure, and thus can be understood in terms of "charge frustration.".

Original language	English
Pages (from-to)	1456-1459
Number of pages	4
Journal	Journal of the Physical Society of Japan
Volume	70
Issue number	6
DOIs	https://doi.org/10.1143/JPSJ.70.1456
Publication status	Published - 2001 Jun

Keywords

Charge ordering
Geometrical frustration
Spinel

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10.1143/JPSJ.70.1456

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abstract = "We have found that spinel AlV2O4 shows a phase transition at ∼700K with anomalies of transport and magnetic properties. It is clarified that this corresponds to a charge-ordering transition, where the V2.5+ ions are separated into three V2.5-δ ions and one V2.5+3δ ion. This three-one type of charge ordering, which is coupled with rhombohedral distortion along the (111) axis, reduces the high degeneracy of ground states inherent in this spinel structure, and thus can be understood in terms of {"}charge frustration.{"}.",

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T1 - Charge Ordering in the Geometrically Frustrated Spinel AlV2O4

AU - Matsuno, Ken Ichiro

AU - Katsufuji, Takuro

AU - Mori, Shigeo

AU - Moritomo, Yutaka

AU - Machida, Akihiko

AU - Nishibori, Eiji

AU - Takata, Masaki

AU - Sakata, Makoto

AU - Yamamoto, Naoki

AU - Takagi, Hidenori

PY - 2001/6

Y1 - 2001/6

N2 - We have found that spinel AlV2O4 shows a phase transition at ∼700K with anomalies of transport and magnetic properties. It is clarified that this corresponds to a charge-ordering transition, where the V2.5+ ions are separated into three V2.5-δ ions and one V2.5+3δ ion. This three-one type of charge ordering, which is coupled with rhombohedral distortion along the (111) axis, reduces the high degeneracy of ground states inherent in this spinel structure, and thus can be understood in terms of "charge frustration.".

AB - We have found that spinel AlV2O4 shows a phase transition at ∼700K with anomalies of transport and magnetic properties. It is clarified that this corresponds to a charge-ordering transition, where the V2.5+ ions are separated into three V2.5-δ ions and one V2.5+3δ ion. This three-one type of charge ordering, which is coupled with rhombohedral distortion along the (111) axis, reduces the high degeneracy of ground states inherent in this spinel structure, and thus can be understood in terms of "charge frustration.".

KW - Charge ordering

KW - Geometrical frustration

KW - Spinel

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Charge Ordering in the Geometrically Frustrated Spinel AlV₂O₄

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Keywords

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