2001/04/30 by Y. Moritomo, Yutaka Moritomo, Moritomo, Y. +2
Materials Science · Physics and Astronomy · #FOS: Physical sciences #Iron-based superconductors research #Materials Science (cond-mat.mtrl-sci) #Physics of Superconductivity and Magnetism #Superconductivity (cond-mat.supr-con) #Superconductivity in MgB2 and Alloys #cond-mat.mtrl-sci #cond-mat.supr-con
paper · pdf · doi:10.48550/arxiv.cond-mat/0104568
4 figure
arxiv created 2001/04/30 · openalex publication_date 2001/04/30 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Effects of chemical substitution of the divalent transition metals has been systematically investigated in Mg1-xMxB2 (x=0.03; M=Mn, Fe, Co, Ni and Zn). Substitution of magnetic ions, i.e., Mn2+, Fe2+, Co2+ and Ni2+, for the Mg2+ ion suppresses T\rm c: dT\rm c/dx is the largest (= - 159 K) in the Mn-doped sample. We have found Zn-substitution increases T\rm c (ΔT\rm c ≈ 0.2 K at x=0.03), perhaps due to the enhanced density of state near the Fermi level.