MnxGe1-xdilute magnetic semiconductor studied by XAFS

Magnetic MnxGe1-x Dots for Spintronics Applications

Hydrogen interstitials-mediated ferromagnetism in MnxGe1−x magnetic semiconductors

Hydrogen interstitials-mediated ferromagnetism in MnxGe1−x magnetic semiconductors was studied by first-principles calculations. It was found that the H:1s state in Mn–H–Mn complexes can strongly hybridize with the valence states of Mn and change the spin polarization of Mn atoms. Although the dopedMn atoms tend to form the nearest-neighborMn atomic pairs with antiferromagnetic coupling in Mn-d...

XAFS Study of CdTe1-xSx Semiconductor Glass Composites

We have measured the X-ray absorption spectra of CdTel.,SX nanocrystals grown in a borosilicate matrix, for X = 0, 0.1, 0.4 and 0.7. The appearance and the growth of the nanocrystals in isothermal heat-treatment at 580°C, observed in optical measurements, were correlated to the evolution of the XANES at the cadmium edge corresponding to the progressive substitution of oxygen atoms by chalcogens...

X-ray Magnetic Absorption and Scattering (XAFS)

1.Introduction In 3rd generation synchrotron radiation (SR), one of the most promising items may be control and characterization of polarization state. In particular, they are a crucial factor to study magnetic properties using the various techniques inscattering, absorption, diffraction and emission experiments. Indeed, low emittance SR such as Spring-8 can efficiently realize this performance...

Porphyrin protonation studied by magnetic circular dichroism.

Magnetic circular dichroism (MCD) spectroscopy provides valuable information about electronic excited states in molecules. The interpretation of spectra is however difficult, often requiring additional theoretical calculations to rationalize the observed signal. Recent developments in time-dependent density functional theory (TDDFT) bring hope that the applicability of MCD spectroscopy for chem...