Yasuji Muramatsu

Characterization of magnetic components in the diluted magnetic semiconductor Zn1-xCoxO by x-ray magnetic circular dichroism

We report on the results of x-ray absorption (XAS), x-ray magnetic circular dichroism (XMCD), and photoemission experiments on {\it n}-type Zn

X-ray absorption near edge structure of DNA bases around oxygen and nitrogen K-edge

_{1-x}

High-energy spectroscopic study of the III-V nitride-based diluted magnetic semiconductor Ga1 xMnxN

Co

Sub-natural-width angle-resolved resonant Auger electron spectroscopy of atoms and molecules on the high resolution soft X-ray monochromator at SPring-8

_x

Soft X-ray emission and absorption spectra in the C K region of sputtered amorphous carbon films

O (

Discrete‐variational‐Xα calculations of buckminsterfullerene (C60) and fulleride x‐ray emission spectra

x=0.05

Intercalation Chemistry and Electronic Structure of Graphite-Like Layered Material BC2N

) thin film, which shows ferromagnetism at room temperature. The XMCD spectra show a multiplet structure, characteristic of the Co

Itinerant U 5 f band states in the layered compound UFeGa 5 observed by soft x-ray angle-resolved photoemission spectroscopy

^{2+}

Hydrogen abstraction from hydrogenated amorphous silicon surface by hydrogen atoms

ion tetrahedrally coordinated by oxygen, suggesting that the ferromagnetism comes from Co ions substituting the Zn site in ZnO. The magnetic field and temperature dependences of the XMCD spectra imply that the non-ferromagnetic Co ions are strongly coupled antiferromagnetically with each other.

Soft x-ray magnetic circular dichroism study of weakly ferromagnetic Zn1−xVxO thin film

Abstract X-ray absorption near edge structure (XANES) spectra of DNA and the nucleobases (adenine, guanine, cytosine, thymine and uracil) are observed using monochromatic soft X-rays (400–560 eV). The photon energy range includes the electron binding energy of the core orbital of nitrogen and oxygen K shell. Obtained XANES spectra showing a characteristic structure were theoretically analyzed by the discrete variational density functional formalism (DV-Xα) method. These results clearly indicate that the photo-excitation of oxygen and nitrogen 1s electron to π* orbitals shows a sharp resonance profile rather than that to σ* orbitals, enough to realize selecting a photochemical reaction site at specific nucleobases in a DNA molecule. Novel experiments are proposed based on the obtained spectra to understand the molecular mechanisms of radiation damages on DNA bases.