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| Hauptseite > Publikationsdatenbank > Magnetic ground state of superconducting $\mathrm{Eu}\left(\mathrm{Fe}{}_{0.88}\mathrm{Ir}{}_{0.12}\right){}_{2}\mathrm{As}{}_{2}$: A combined neutron diffraction and first-principles calculation study |
| Hauptseite > Publikationsdatenbank > Magnetic ground state of superconducting $\mathrm{Eu}\left(\mathrm{Fe}{}_{0.88}\mathrm{Ir}{}_{0.12}\right){}_{2}\mathrm{As}{}_{2}$: A combined neutron diffraction and first-principles calculation study |
| Journal Article | FZJ-2015-01493 |
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2015
APS
College Park, Md.
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Please use a persistent id in citations: http://hdl.handle.net/2128/8409 doi:10.1103/PhysRevB.91.064506
Abstract: The magnetic order of the localized Eu2+ spins in optimally doped Eu(Fe1−xIrx)2As2 (x=0.12) with superconducting transition temperature TSC=22 K was investigated by single-crystal neutron diffraction. The Eu2+ moments were found to be ferromagnetically aligned along the c direction with an ordered moment of 7.0(1) μB well below the magnetic phase transition temperature TC=17 K. No evidence of the tetragonal-to-orthorhombic structural phase transition was found in this compound within the experimental uncertainty, in which the spin-density-wave (SDW) order of the Fe sublattice is supposed to be completely suppressed and the superconductivity gets fully developed. The ferromagnetic ground state of the Eu2+ spins in Eu(Fe0.88Ir0.12)2As2 was supported by the first-principles density functional calculation. In addition, comparison of the electronic structure calculations between Eu(Fe0.875Ir0.125)2As2 and the parent compound EuFe2As2 indicates stronger hybridization and more expanded bandwidth due to the Ir substitution, which together with the introduction of electrons might work against the Fe-SDW in favor of the superconductivity.
Keyword(s): Magnetic Materials (1st) ; Key Technologies (1st) ; Fundamental Science (1st) ; Magnetism (2nd) ; Condensed Matter Physics (2nd)
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