title: Charge ordering and spin frustration in AlV2-x CrxO4.
abstract: The relationship between charge and spin degrees of freedom in a geometrically frustrated system, AlV2-xCrxO4 spinel, is investigated. Upon Cr doping, the charge-ordered phase of AlV2O4 is rapidly suppressed and a charge-disordered phase grows up instead. It is found that the magnetic ground state is a spin-glass state dominated by geometrical frustration for both phases, but larger spin entropy remains down to low temperatures in the charge-ordered phase, possibly owing to its two-dimensional character.
authors.affiliation: Department of Advanced Materials Science, University of Tokyo, Tokyo 113-8656, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Matsuno
authors.forename: T
authors.initials: T
authors.lastname: Katsufuji
authors.forename: S
authors.initials: S
authors.lastname: Mori
authors.forename: M
authors.initials: M
authors.lastname: Nohara
authors.forename: A
authors.initials: A
authors.lastname: Machida
authors.forename: Y
authors.initials: Y
authors.lastname: Moritomo
authors.forename: K
authors.initials: K
authors.lastname: Kato
authors.forename: E
authors.initials: E
authors.lastname: Nishibori
authors.forename: M
authors.initials: M
authors.lastname: Takata
authors.forename: M
authors.initials: M
authors.lastname: Sakata
authors.forename: K
authors.initials: K
authors.lastname: Kitazawa
authors.forename: H
authors.initials: H
authors.lastname: Takagi