title: X-ray directional dichroism of a polar ferrimagnet.
abstract: In a polar ferrimagnet GaFeO3, we have found a novel magneto-optical effect, termed x-ray nonreciprocal directional dichroism (XNDD), that the x-ray absorption at around the K edge of an Fe ion depends on whether the x-ray propagation vector is parallel or antiparallel to the outer product of the magnetization and electric-polarization vectors. The XNDD spectroscopy as demonstrated here can be a useful tool to probe the local magnetism in noncentrosymmetric systems such as magnetic interfaces and nanostructures.
authors.affiliation: Spin Superstructure Project, ERATO, Japan Science and Technology Corporation, AIST Tsukuba Central 4, Tsukuba 305-8562, Japan. mkubota@post.kek.jp
authors.forename: M
authors.initials: M
authors.lastname: Kubota
authors.forename: T
authors.initials: T
authors.lastname: Arima
authors.forename: Y
authors.initials: Y
authors.lastname: Kaneko
authors.forename: J P
authors.initials: JP
authors.lastname: He
authors.forename: X Z
authors.initials: XZ
authors.lastname: Yu
authors.forename: Y
authors.initials: Y
authors.lastname: Tokura