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

Research output: Contribution to journalArticle

75 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 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.".

Original languageEnglish
Pages (from-to)1456-1459
Number of pages4
Journaljournal of the physical society of japan
Volume70
Issue number6
DOIs
Publication statusPublished - 2001 Jun 1

Keywords

  • Charge ordering
  • Geometrical frustration
  • Spinel

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Matsuno, K. I., Katsufuji, T., Mori, S., Moritomo, Y., Machida, A., Nishibori, E., Takata, M., Sakata, M., Yamamoto, N., & Takagi, H. (2001). Charge Ordering in the Geometrically Frustrated Spinel AlV2O4. journal of the physical society of japan, 70(6), 1456-1459. https://doi.org/10.1143/JPSJ.70.1456