We report the effect of protected vacuum annealing on the superconducting (SC) and magnetic properties of Pr1-xLaCe x CuO4 (PLCCO) single crystals in the overdoped regime (x = 0.13 - 0.20). The powders and single crystals of PLCCO with all x were synthesized by the solid state reaction and grown by the travelling solvent floating zone (TSFZ) method, respectively. The powder x-ray diffraction (XRD) results analyzed by the Rietveld method have shown that there is a systematic decrease in the c-axis length with increasing x, suggesting the proper substitution of Ce for Pr in overdoped PLCCO up to x = 0.20. The so-called two-step annealing performed in the overdoped regime was essential for increasing the SC volume fraction estimated from the magnetic susceptibility measurements. Furthermore, the temperature dependence of the normal-state magnetic susceptibility for reduced crystals of PLCCO with all x has exhibited a Curie-Weiss-like behavior regardless of various steps of the protected vacuum annealing process.
|ジャーナル||IOP Conference Series: Materials Science and Engineering|
|出版ステータス||Published - 2017 5月 20|
|イベント||3rd International Conference on Functional Materials Science 2016, ICFMS 2016 - Sanur-Bali, Indonesia|
継続期間: 2016 10月 19 → 2016 10月 20
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