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铁基超导单晶NaFe1-xCoxAs的空气敏感性探究

Air sensitivity of iron-based sigle-crystal superconductor NaFe1-xCoxAs

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【作者】 李意弓文平谈国太

【Author】 LI Yi;GONG Wen-ping;TAN Guo-tai;Department of Physics,Beijing Normal University;

【通讯作者】 谈国太;

【机构】 北京师范大学物理学系

【摘要】 NaFe1-xCoxAs单晶因含有碱金属Na元素,暴露在空气中时其表面会剧烈地产生气泡,这为该类单晶的生长和测量带来了难度.为此探究了无水乙醇对降低NaFe1-xCoxAs单晶空气敏感性的作用效果,因乙醇分子渗入单晶的Na+层,经无水乙醇浸泡的单晶样品,长时间(超30d)暴露于空气中,其表面形貌及磁化率等物性几乎稳定不变,这为类似单晶样品在空气中制备电极或测量提供了有益参考.

【Abstract】 NaFe1-xCoxAs single-crystal contains Na,which makes the surface bubble violently when exposed to air.That makes it difficult to grow and measure the single-crystal.To tackle with this problem,the effect of anhydrous ethanol on reducing air sensitivity of NaFe1-xCoxAs single-crystal was explored.Having been exposed to air for a long time(over 30days),the surface morphology,magnetic susceptibility and other physical properties of the anhydride soaked samples were almost stable because ethanol molecules penetrated into the Na+ layer of the single-crystal.The study would provide a significant reference for preparation of the electrodes or measurement relacting to the similar samples.

【基金】 基础学科拔尖学生培养计划(No.10100-311310028)
  • 【文献出处】 物理实验 ,Physics Experimentation , 编辑部邮箱 ,2022年02期
  • 【分类号】TQ131.12;O511
  • 【下载频次】53
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