X-ray directional dichroism of a polar ferrimagnet.
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.
Kubota
M
M
Spin Superstructure Project, ERATO, Japan Science and Technology Corporation, AIST Tsukuba Central 4, Tsukuba 305-8562, Japan. mkubota@post.kek.jp
Arima
T
T
Kaneko
Y
Y
He
J P
JP
Yu
X Z
XZ
Tokura
Y
Y