Narrow superconducting window inLaFe1−xNixAsO

2008/07/31 by Guang‐Han Cao, Guanghan Cao, Shuai Jiang +12 · 2 citations
Business, Management and Accounting · Materials Science · Physics and Astronomy · #Corporate Taxation and Avoidance #Iron-based superconductors research #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.79.174505

published as Phys. Rev. B 79, 174505 (2009). · 6 pages, 7 figures and 3 tables. Accepted for publication in PRB

arxiv created 2009/04/16 · openalex publication_date 2009/05/05 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We have studied Ni-substitution effect in LaFe_1\ensuremath-xNi_xAsO (0\ensuremath≤x\ensuremath≤0.1) by the measurements of x-ray diffraction, electrical resistivity, magnetic susceptibility, and heat capacity. The nickel doping drastically suppresses the resistivity anomaly associated with spin-density-wave ordering in the parent compound. Superconductivity emerges in a narrow region of 0.03\ensuremath≤x\ensuremath≤0.06 with the maximum T_c of 6.5 K at x=0.04, where enhanced magnetic susceptibility shows up. The upper critical field at zero temperature is estimated to exceed the Pauli paramagnetic limit. The much lowered T_c in comparison with LaFeAsO_1\ensuremath-xF_x system is discussed.

Citations

• Strong-coupling superconductivity in the nickel-based oxypnictideLaNiAsO1−xFx
• Iron-based layered compound LaFeAsO is an antiferromagnetic semimetal
• Crystallographic phase transition and high-Tcsuperconductivity in LaFeAsO:F
• Competing orders and spin-density-wave instability in La(O 1−x F x )FeAs
• Anisotropy in the Electrical Resistivity and Susceptibility of SuperconductingBaFe2As2Single Crystals
• Multiband magnetism and superconductivity in Fe-based compounds
• Theory of the Magnetic Moment in Iron Pnictides
• Doping-dependent phase diagram of LaOMAs (M=V–Cu) and electron-type superconductivity near ferromagnetic instability
• Strong Correlations and Magnetic Frustration in the HighTcIron Pnictides
• Two-band superconductivity in LaFeAsO0.89F0.11 at very high magnetic fields
• High-Field Pauli-Limiting Behavior and Strongly Enhanced Upper Critical Magnetic Fields near the Transition Temperature of an Arsenic-DeficientLaO0.9F0.1FeAs1−δSuperconductor
• Superconductivity at 22 K in Co-DopedBaFe2As2Crystals
• Thorium-doping–induced superconductivity up to 56 K in Gd 1−x Th x FeAsO

Cited by

• Anisotropic electrical resistivity of LaFeAsO: Evidence for electronic nematicity
• A New ZrCuSiAs-Type Superconductor: ThFeAsN