title: Unusually large magnetic anisotropy in a CuO-based semiconductor Cu5V2O10.
abstract: A CuO-based material Cu(5)V(2)O(10) was successfully grown in a closed crucible using Sr(OH)(2)·8H(2)O as flux. The structure of Cu(5)V(2)O(10) can be viewed as being composed of two types of zigzag Cu-O chains running along the b- and c-axes, which shows a two-dimensional crosslike framework with 12-column square tunnels along the a-axis. Magnetic measurements show that Cu(5)V(2)O(10) exhibits unexpected large magnetic anisotropy, which is the first time magnetic anisotropy energy of ∼10(7) erg/cm(3) in the CuO-based materials has been observed. The origins of large anisotropy are suggested to arise from strong anisotropic exchanges due to the particular bonding geometry and the Jahn-Teller distortion of Cu(2+) ions. Further, the band structure investigated by the GGA+U method suggests that Cu(5)V(2)O(10) is a semiconductor.
authors.affiliation: State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China. hcz1988@hotmail.com
authors.forename: Zhangzhen
authors.initials: Z
authors.lastname: He
authors.forename: Chensheng
authors.initials: C
authors.lastname: Lin
authors.forename: Wendan
authors.initials: W
authors.lastname: Cheng
authors.forename: Atsushi
authors.initials: A
authors.lastname: Okazawa
authors.forename: Norimichi
authors.initials: N
authors.lastname: Kojima
authors.forename: Jun-ichi
authors.initials: J
authors.lastname: Yamaura
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Ueda