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}
}
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… 
7 Citations

Figures from this paper

Neutron diffraction and the electronic properties of BaFe2Se3
It is argued on the basis of previously published experimental data that, the magnetic space-group Cac (#9.41) is the correct description of magnetically ordered BaFe2Se3. The corresponding crystal
Neutron scattering study of the magnetoelectric compound GaFeO3
Abstract We present a neutron scattering study carried out on single-crystals of the magnetoelectric compound GaFeO3, prepared by the floating-zone (FZ) method. The refinement of the crystal
Resonant x-ray scattering from chiral materials:α-quartz andα-berlinite
We study the resonant x-ray scattering at Si and Al K-edges from chiral materials, $\alpha$-quartz and $\alpha$-berlinite. We derive the general form of the scattering matrix for the dipole
Parity-Odd Atomic Multipoles in X-ray Scattering and Absorption
Scattering of x-rays enhanced by an electric dipole–electric quadrupole (E1–E2) event probe parity-odd atomic multipoles at the heart of many current theories of complex materials, e.g., Mott–Hubbard
Atomic Theory of Parity-Odd (E1–M1) Photon Absorption Event
Light scattering proceeding through electric and magnetic dipole absorption events (E1–M1) exhibits natural circular dichroism, widely used in the characterization of chiral media, and the
X-ray detected optical activity
The detection of optical activity (OA) with X-rays became possible with third generation synchrotron radiation sources. X-ray detected OA stems mainly from electric dipole–electric quadrupole
Second harmonic generation in a polar ferrimagnetGaFeO3
We have studied second harmonic generation (SHG) in a polar ferrimagnet ${\text{GaFeO}}_{3}$, employing a ${\text{FeO}}_{6}$ cluster model in which the Fe atom is slightly shifted from the center of

References

SHOWING 1-10 OF 43 REFERENCES
X-ray directional dichroism of a polar ferrimagnet.
TLDR
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
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
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.
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.
TLDR
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
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
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
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)
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
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
...
1
2
3
4
5
...