Electronic structure ofCr1‐δX(X=S,Te)studied by Cr2psoft x-ray magnetic circular dichroism
| Autor: | Takayuki Muro, Hitoshi Sato, C. Hirai, Akio Kimura, Shin Imada, Koichiro Yaji, Masaki Taniguchi, Michie Koyama, Shigemasa Suga, Kenya Shimada, Arata Tanaka |
|---|---|
| Rok vydání: | 2004 |
| Předmět: | |
| Zdroj: | Physical Review B. 70 |
| ISSN: | 1550-235X 1098-0121 |
| DOI: | 10.1103/physrevb.70.064402 |
| Popis: | Cr $2p$ core excited x-ray absorption and x-ray magnetic circular dichroism (XMCD) spectra of ferromagnetic ${\mathrm{Cr}}_{1\text{\penalty1000-\hskip0pt}\ensuremath{\delta}}\mathrm{Te}$ with several concentrations of $\ensuremath{\delta}=0.11--0.33$ and ferrimagnetic ${\mathrm{Cr}}_{5}{\mathrm{S}}_{6}$ have been measured. The observed XMCD line shapes are found to very weakly depend on $\ensuremath{\delta}$ for ${\mathrm{Cr}}_{1\text{\penalty1000-\hskip0pt}\ensuremath{\delta}}\mathrm{Te}$. The experimental results are analyzed by means of a configuration-interaction cluster model calculation with consideration of hybridization and electron correlation effects. The obtained values of the spin magnetic moment by the cluster model analyses are in agreement with the results of the band structure calculation. The calculated result shows that the doped holes created by the Cr deficiency exist mainly in the Te $5p$ orbital of ${\mathrm{Cr}}_{1\text{\penalty1000-\hskip0pt}\ensuremath{\delta}}\mathrm{Te}$, whereas the holes are likely to be in the Cr $3d$ state for ${\mathrm{Cr}}_{5}{\mathrm{S}}_{6}$. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|