Charge ordering and spin frustration in AlV2-x CrxO4.
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.
Matsuno
K
K
Department of Advanced Materials Science, University of Tokyo, Tokyo 113-8656, Japan.
Katsufuji
T
T
Mori
S
S
Nohara
M
M
Machida
A
A
Moritomo
Y
Y
Kato
K
K
Nishibori
E
E
Takata
M
M
Sakata
M
M
Kitazawa
K
K
Takagi
H
H