Annealing effects on superconductivity in SrFe2-xNixAs2

Abstract

Superconductivity has been explored in single crystals of the Ni-doped FeAs-compound SrFe2-xNixAs2 grown by self-flux solution method. The antiferromagnetic order associated with the magnetostructural transition of the parent compound SrFe2As2 is gradually suppressed with increasing Ni concentration x and bulk-phase superconductivity with full diamagnetic screening is induced near the optimal doping of x = 0.15 with a maximum transition temperature Tc ~9.8 K. An investigation of high-temperature annealing on as-grown samples indicate that the heat treatment can enhance Tc as much as ~50 %.

References in corpus (12)

• Superconductivity at 22 K in Co-doped BaFe2As2 Crystals
• Effects of Co substitution on thermodynamic and transport properties and anisotropic $H_{c2}$ in Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$ single crystals
• Determination of the phase diagram of the electron doped superconductor Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$
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• Superconductivity in SrFe_(2-x)Co_xAs_2: Internal Doping of the Iron Arsenide Layers
• Structural transition and anisotropic properties of single crystalline SrFe2As2
• Superconductivity induced by doping Pd in SrFe2-xPdxAs2
• Tailoring the Superconductivity and Antiferromagnetic Order in SrFe2-xRhxAs2
• Superconductivity and phase diagrams in 4d- and 5d-metal-doped iron arsenides SrFe_{2-x}M_xAs_2 (M = Rh, Ir, Pd)
• Superconducting and ferromagnetic phases induced by lattice distortions in SrFe2As2
• Evolution of bulk superconductivity in SrFe2As2 with Ni substitution
• Superconductivity in LnFePO (Ln = La, Pr, and Nd) single crystals

Cited by in corpus (5)

• Superconductivity in Iron Compounds
• Effect of annealing on the specific heat of Ba(Fe1-xCox)2As2
• Universal pair-breaking in transition metal-substituted iron-pnictide superconductors
• Evidence for line nodes in the energy gap of the overdoped Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$ from low-temperature specific heat measurements
• A neutron scattering study of the under-doped Ba${}_{1-x}$K${}_x$Fe${}_2$As${}_2$, x=0.09 and 0.17 self-flux grown single crystals and the universality of the tricritical point