Chemical State Mapping of p/n-Controlled SrB6 Bulk Specimens by Soft X-ray Emission Electron Microscope

Terauchi, Masami; Sato, Yohei; Takeda, M.

doi:10.3390/app11209588

Cited by 4 publications

(1 citation statement)

References 34 publications

(45 reference statements)

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“…Since the SXES with SEM/EPMA is a non-destructive inspection method of chemical bonding states, it can accelerate the production of new functional materials by providing a quick feedback of the evaluated results to the material production process. Recently, a commercial SXES instrument for an SEM [ 12 ] has been applied to visualize the chemical bonding state distribution of boron atoms in high-performance steel [ 13 ], control rods of atomic power plants [ 14 , 15 ] and p/n -controlled thermoelectric bulk materials [ 16 ], as well as the sp 2 – sp 3 bonding distribution in functional amorphous carbon nitride films [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

Characteristics and exchange interactions observed in L-emission spectra of Fe, Mn and their oxides by using a high-energy-resolution soft X-ray emission spectroscopy instrument

et al. 2022

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For examining the characteristics of L-emissions of Fe, Mn, and those oxides, a larger energy-dispersion spectrometer for an electron-probe microanalyzer was constructed. The energy resolution was evaluated to be 0.3 eV at the Fermi edge observed for the B K-emission of LaB6. The Lℓ emission profiles and peak positions of those oxides were different from those of pure metals, reflecting the different density of states of valence bands and different charge states of metal elements. The Lℓ emission profiles of the oxides showed shoulder structures, even though the emission is caused by transitions between two inner-shell levels. The presence of the shoulder structures was assigned to the result of the 3s3d exchange interaction in the final state of the Lℓ emission, in which the 3s state has a spin. The Lℓ profiles were decomposed into two peaks by Lorentz fit and the energy separation was evaluated to be about 3 eV.

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Section: Introductionmentioning

confidence: 99%

Characteristics and exchange interactions observed in L-emission spectra of Fe, Mn and their oxides by using a high-energy-resolution soft X-ray emission spectroscopy instrument

et al. 2022

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Anisotropic electronic structure of NaAlSi studied by angle-resolved soft x-ray emission spectroscopy

Ebisu,

Sato,

Yamada

et al. 2023

Journal of Applied Physics

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The characteristic x-ray emission direction of a material indicates the direction of the bonding orbitals and spatial symmetry of the electron orbitals. Accordingly, the intensity of x-ray emission, which varies with the direction of emission and crystal orientation, provides crucial information regarding anisotropic electronic structures. This study utilized angle-resolved soft x-ray emission spectroscopy (SXES) on a layered material, NaAlSi, to ascertain the spatial distribution of the valence electrons. Distinct alterations in the spectral intensity distributions were observed in the Al–L2,3 and Si–L2,3 spectra with respect to the emission angle. To interpret the anisotropic SXES spectra, the spatial distribution of each valence electronic state was simulated using first-principle calculations. Although the anisotropic emission intensity could not explain the symmetry of the spatial distributions of the isolated s and d atomic orbitals, the anisotropy of the SXES spectra could be interpreted as the spatial distribution of these orbitals when hybridized with p orbitals. Furthermore, the spectral structure corresponding to the electronic states near the Fermi level reflected the characteristics of the d orbitals. Therefore, angle-resolved SXES measurements can effectively discern the spatial distribution of hybridized electron orbitals with specific energy levels, which could enhance techniques related to electron distribution analysis, with potential applications in material science and electronic structure characterization.

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Simple derivation of L-absorption spectra of 3d transition metal elements by the self-absorption effect observed in soft X-ray emission spectra

Terauchi,

Sato,

Yokoyama

et al. 2024

Microscopy

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This study proposes a simple evaluation method for deriving L-absorption information from two L-emission spectra of 3d transition metal (TM) elements obtained at two different accelerating voltages. This method realizes a spatial identity for X-ray emission and absorption spectroscopies. This method was evaluated for the Fe L-emission spectra of Fe and its oxides, and was applied to the TM L-emission spectra of MnO, Co, CoO, and NiO. The derived absorption peak positions were consistent with those obtained previously at synchrotron orbital radiation facilities, which considered the core-hole effect. This simple derivation method could be useful for obtaining X-ray absorption spectroscopy distribution images from X-ray emission spectroscopy mapping data obtained by scanning electron microscopy.

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Chemical State Mapping of p/n-Controlled SrB6 Bulk Specimens by Soft X-ray Emission Electron Microscope

Cited by 4 publications

References 34 publications

Characteristics and exchange interactions observed in L-emission spectra of Fe, Mn and their oxides by using a high-energy-resolution soft X-ray emission spectroscopy instrument

Characteristics and exchange interactions observed in L-emission spectra of Fe, Mn and their oxides by using a high-energy-resolution soft X-ray emission spectroscopy instrument

Anisotropic electronic structure of NaAlSi studied by angle-resolved soft x-ray emission spectroscopy

Simple derivation of L-absorption spectra of 3d transition metal elements by the self-absorption effect observed in soft X-ray emission spectra

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