We perform theoretical calculations and experimental measurements for magnetic circular dichroism in resonant X-ray emission spectroscopy (MCD-RXES) in Gd3+ systems. A general expression of MCD-RXES is obtained theoretically for arbitrary directions of incident and emitted X-rays with an atomic model. It is shown that when the incident X-ray is perpendicular to the magnetization of the sample the MCD-RXES originates from the quantum mechanical interference between the excitation and decay processes. The behavior of MCD-RXES calculated for the 2p → 5d excitation and 3d → 2p radiative decay in Gd3+ is in good agreement with that measured experimentally for a Gd33Co67 amorphous alloy.
- Electric dipole transition
- Interference effect
- Magnetic circular dichroism
- Resonant X-ray emission spectroscopy