29 research outputs found
Itinerant U 5f band states in the layered compound UFeGa5 observed by soft X-ray angle-resolved photoemission spectroscopy
We have performed angle-resolved photoemission spectroscopy (ARPES)
experiments on paramagnetic UFeGa5 using soft X-ray synchrotron radiation
(hn=500eV) and derived the bulk- and U 5f-sensitive electronic structure of
UFeGa5. Although the agreement between the experimental band structure and the
LDA calculation treating U 5f electrons as being itinerant is qualitative, the
morphology of the Fermi surface is well explained by the calculation,
suggesting that the U 5f states can be essentially understood within the
itinerant-electron model.Comment: 13 pages, 4 figur
X-ray magnetic circular dichroism and photoemission study of the diluted ferromagnetic semiconductor ZnCrTe
We have performed x-ray magnetic circular dichroism (XMCD) and valence-band
photoemission studies of the diluted ferromagnetic semiconductor
ZnCrTe. XMCD signals due to ferromagnetism were observed at the Cr
2p absorption edge. Comparison with atomic multiplet calculations suggests that
the magnetically active component of the Cr ion was divalent under the
tetrahedral crystal field with tetragonal distortion along the crystalline a-,
b-, and c-axes. In the valence-band spectra, spectral weight near the Fermi
level was strongly suppressed, suggesting the importance of Jahn-Teller effect
and the strong Coulomb interaction between the Cr 3d electrons
Soft X-ray Absorption and Photoemission Studies of Ferromagnetic Mn-Implanted 3-SiC
We have performed x-ray photoemission spectroscopy (XPS), x-ray absorption
spectroscopy (XAS), and resonant photoemission spectroscopy (RPES) measurements
of Mn-implanted 3-SiC (3-SiC:Mn) and carbon-incorporated MnSi
(MnSi:C). The Mn 2 core-level XPS and XAS spectra of 3-SiC:Mn
and MnSi:C were similar to each other and showed "intermediate"
behaviors between the localized and itinerant Mn 3 states.
The intensity at the Fermi level was found to be suppressed in 3-SiC:Mn
compared with MnSi:C. These observations are consistent with the
formation of MnSi:C clusters in the 3-SiC host, as observed in a
recent transmission electron microscopy study.Comment: 4 pages, 3 figure