Decoupling of itinerant and localized <i>d</i>-orbital electrons in the compound Sc<sub>0.5</sub>Zr<sub>0.5</sub>Co

Journal of Physics. Condensed Matter : an Institute of Physics Journal
Jin SiHai-Hu Wen

Abstract

By using the arc-melting method, we successfully synthesize the compound Sc0.5Zr0.5Co with the space group ofPm-3m. Both the resistivity and magnetic susceptibility measurements reveal a phase transition at about 86 K. This transition might be attributed to the establishment of an antiferromagnetic order. The magnetization hysteresis loop measurements in wide temperature region show a weak ferromagnetic feature, which suggests a possible canted arrangement of the magnetic moments. Bounded by the phase transition temperature, the resistivity at ambient pressure shows a change from Fermi liquid behavior to a super-linear behavior as temperature increases. By applying pressures up to 32.1 GPa, the transition temperature does not show a clear change and no superconductivity is observed above 2 K. The density functional theory (DFT) calculations confirm the existence of the antiferromagnetic order and reveal a gap between the spin-up and spin-downd-orbital electrons. This kind of behavior may suggest that the antiferromagnetic order in this compound originates from the localizedd-electrons which do not contribute to the conductance. Thus the itinerant and localized d-orbital electrons in the compound are decoupled.

References

Aug 3, 2006·Journal of the American Chemical Society·Yoichi KamiharaHideo Hosono
Jan 7, 2009·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Patricia L AlirezaSuchitra E Sebastian
May 31, 2014·Nature Communications·M JourdanM Kläui
Nov 20, 2014·Nature Communications·Wei WuJianlin Luo
Jul 15, 2015·Nature Communications·E SvanidzeE Morosan

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