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Title of Journal: Sci China Phys Mech Astron

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Abbravation: Science China Physics, Mechanics and Astronomy

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SP Science China Press

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DOI

10.1007/s00779-016-0940-x

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1869-1927

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Heat treatment effects on the superconducting prop

Authors: ZhiYu Zhang Lei Wang YanPeng Qi ZhaoShun Gao DongLiang Wang XianPing Zhang YanWei Ma
Publish Date: 2010/05/14
Volume: 53, Issue: 7, Pages: 1187-1193
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Abstract

The superconducting properties of polycrystalline Sr06K04Fe2As2 were strongly influenced by Ag doping Supercond Sci Technol 23 2010 025027 Ag addition is mainly dominated by silver diffusing so the annealing process is one of the essential factors to achieve high quality Ag doped Sr06K04Fe2As2 In this paper the optimal annealing conditions were studied for Ag doped Sr06K04Fe2As2 bulks prepared by a onestep solid reaction method It is found that the annealing temperature has a strong influence on the superconducting properties especially on the critical current density J c As a result higher heat treatment temperature ∼900°C is helpful in diffusing Ag and reducing the impurity phase gathered together to improve the grain connectivity In contrast lowtemperature sintering is counterproductive for Ag doped samples These results clearly suggest that annealing at ∼900°C is necessary for obtaining high J c Agdoped samples

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