Doping and disorder in the CoMnAl and CoMnGa half-metallic Heusler alloys
arXiv:cond-mat/0607652 · doi:10.1103/PhysRevB.74.172412
Abstract
We expand our study on the full-Heusler compounds [I. Galanakis \textit{et al.}, Appl. Phys. Lett. \textbf{89}, 042502 (2006)] to cover also the case of doping and disorder in the case of CoMnAl and CoMnGa half-metallic Heusler alloys. These alloys present a region of very small minority density of states instead of a real gap. Electronic structure calculations reveal that doping with Fe and Cr in the case of CoMnAl retains the half-metallicity contrary to the CoMnGa compound. Cr impurities present an unusual behavior and the spin moment of the Cr impurity scales almost linearly with the concentration of Cr atoms contrary to the CoMnZ (Z= Si, Ge, Sn) where it was almost constant. Half-metallicity is no more preserved for both CoMnAl and CoMnGa alloys when disorder occurs and there is either excess of Mn or atoms.
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Cited by in corpus (12)
- Spin-polarization and electronic properties of half-metallic Heusler alloys calculated from first-principles
- Influence of mixing the low-valent transition metal atoms (Y,Y=Cr,Mn,Fe) on the properties of the quaternary Co[YY]Z (Z=Al,Ga,Si,Ge,Sn) Heusler compounds
- Thickness dependence of the anomalous Hall effect in thin films of the topological semimetal CoMnGa
- Ferrimagnetism and disorder in epitaxial Mn(2-x)Co(x)VAl thin films
- Engineering the electronic, magnetic and gap-related properties of the quinternary half-metallic Heusler alloys
- First principles studies of the Gilbert damping and exchange interactions for half-metallic Heuslers alloys
- Magnetocaloric properties and critical behavior of CoCrMnAl Heusler alloys
- Structure, magnetism and magnetic compensation behavior of Co50-xMn25Ga25+x and Co50-xMn25+xGa25 Heusler alloys
- Epitaxial Heusler Superlattice Co2MnAl/Fe2MnAl with Perpendicular Magnetic Anisotropy and Termination-Dependent Half-Metallicity
- Influence of anti-site disorder and electron-electron correlations on the electronic structure of CeMnNi
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- Anomalous resistivity upturn in epitaxial L21-Co2MnAl films