Abstract

A solid solution Sr2FeReO6–xRe [SFRO–xRe] system with 0wt%≤x≤20wt% was synthesized by conventional solid state method. With increasing the amount of Re, crystallinity of SFRO was confirmed to increase, but the addition of large amount of Re induced the formation of the second phase (Re and unknown), resulting in the solubility limit of Re into SFRO. Compared to a sample by a muffle furnace, relative density of SFRO by SPS was relatively high and increased with increasing the amount of Re. Besides, with increasing the Re content, it was found that the dense microstructure was formed with large grains, which is probably due to the liquid phase related to Re inside the sample during sintering. The magnetic property was found as a function of Re content that saturation magnetization was increased while remnant magnetization was not significant. In addition, coercive magnetic field was slightly decreased as well, reflecting the typical soft materials. Therefore, the addition of Re is strongly effective to improve microstructure and magnetic property of SFRO.

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