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Annealing effects on superconductivity in SrFe2-xNixAs2

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arxiv 0908.4095 v2 pith:WTI6NQMO submitted 2009-08-27 cond-mat.supr-con cond-mat.str-el

Annealing effects on superconductivity in SrFe2-xNixAs2

Shanta R. Saha , Nicholas P. Butch , Kevin Kirshenbaum , Johnpierre Paglione This is my paper
classification cond-mat.supr-con cond-mat.str-el
keywords superconductivityannealingsrfe2-xnixas2transitionantiferromagneticas-grownassociatedbeen
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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 %.

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