Directional Dichroism of X-Ray Absorption in a Polar Ferrimagnet GaFeO_3

@article{Igarashi2009DirectionalDO,
title={Directional Dichroism of X-Ray Absorption in a Polar Ferrimagnet GaFeO\_3},
author={Jun–ichi Igarashi and Tatsuya Nagao},
journal={arXiv: Strongly Correlated Electrons},
year={2009}
}
• Published 1 September 2009
• Physics
• arXiv: Strongly Correlated Electrons
We study the directional dichroic absorption spectra in the x-ray region in a polar ferrimagnet GaFeO_3. The directional dichroism on the absorption spectra at the Fe pre-K-edge arises from the E1-E2 interference process through the hybridization between the 4p and 3d states in the noncentrosymmetric environment of Fe atoms. We perform a microscopic calculation of the spectra on a model of FeO_6 with reasonable parameter values for Coulomb interaction and hybridizations. We obtain the…
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References

SHOWING 1-10 OF 43 REFERENCES
X-ray directional dichroism of a polar ferrimagnet.
• Physics
Physical review letters
• 2004
The x-ray nonreciprocal directional dichroism (XNDD) spectroscopy can be a useful tool to probe the local magnetism in noncentrosymmetric systems such as magnetic interfaces and nanostructures.
Analysis of optical magnetoelectric effect in GaFeO 3
• Physics
• 2009
We study the optical absorption spectra in a polar ferrimagnet GaFeO_3. We consider the E1, E2 and M1 processes on Fe atoms. It is shown that the magnetoelectric effect on the absorption spectra
Theoretical analysis of resonant inelastic x-ray scattering spectra in LaMnO 3
• Physics
• 2008
We analyze the resonant inelastic x-ray scattering (RIXS) spectra at the K edge of Mn in the antiferromagnetic insulating manganite LaMnO3. We make use of the Keldysh-type Green-function formalism,
Pre-K-Edge Structure on Anomalous X-Ray Scattering in LaMnO3.
• Physics
• 2000
We study the pre-K-edge structure of the resonant X-ray scattering for forbidden reflections (anomalous scattering) in LaMnO 3 , using the band structure calculation based on the local density
Optical magnetoelectric effect in the polar GaFeO3 ferrimagnet.
• Physics
Physical review letters
• 2004
The observation of a large ME effect in the present compound suggests a possible route to magnification of this novel phenomenon for application.
Analysis of resonant inelastic x-ray scattering at the K edge in NiO
• Physics
• 2007
We analyze the resonant inelastic x-ray scattering (RIXS) spectra at the Ni $K$ edge in an antiferromagnetic insulator NiO by applying the theory developed by the present authors. It is based on the
Resonant Magnetoelectric X-ray Scattering in GaFeO3: Observation of Ordering of Toroidal Moments
• Physics
• 2005
We report on the first observation of magnetoelectric X-ray scattering (MEXS), i.e., incident- k -direction-dependent scattering, for a polar ferrimagnet GaFeO 3 . Near the K edge of Fe, the magnet...
Polar and magnetoelectric multipoles in gallium ferrate inferred from optical and x-ray measurements
• Physics
• 2007
Observations utilizing optical and x-ray techniques of coexisting magnetoelectric, piezoelectric and magnetic modifications in gallium ferrate (GaFeO3) are successfully analysed with an atomic model
Parity and Time-Reversal Breaking Effects on Resonant X-ray Scattering at the Fe Pre-K-Edge in Magnetite(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
• Physics
• 2008
We study noncentrosymmetric effects on resonant x-ray scattering (RXS) in magnetite. The noncentrosymmetry at A sites in spinel structure makes the 4 p states strongly hybridize with the 3 d states
Ultrafast polarization and magnetization response of multiferroic GaFeO 3 using time-resolved nonlinear optical techniques
• Physics
• 2009
We have investigated the ultrafast electric and magnetic response of multiferroic ${\text{GaFeO}}_{3}$ induced by irradiation of a femtosecond laser pulse. By using the polarization selection rules