Fe1 1- xTex超导体的自加热免烧快速合成
Fast synthesis of Fe1.1Se1-xTex superconductors in a self-heating and furnace-free way
摘要：
首次采用快速无污染的燃烧合成法合成了铁基超导体。利用该方法，仅需几十秒就可从元素粉末的自维持反应中制备Fe_（1.1）Se_（1-x）Tex（0<=x<=1）样品。在10-14 K温度范围内，Fe_（1.1）Se_（1-x）Tex样品具有明显的零电阻率和相应的磁化率下降。Fe1.1Se0.33Te0.67样品显示出约14 K的最高起始Tc，并且其上临界场估计为约54 T。与传统的固态反应制备多晶FeSe样品相比，燃烧合成具有更少的时间和能量消耗，但提供了相当的超导性能。燃烧合成法有望用于制备大量的铁基超导体，并在这一方向上开展了进一步的相关工作。
英文摘要：
A fast and furnace-free method of combustion synthesis is employed for the first time to synthesize iron-based superconductors. Using this method, Fe1.1Se1-xTex (0<=x<=1) samples can be prepared from self-sustained reactions of element powders in only tens of seconds. The obtained Fe1.1Se1-xTex samples show clear zero resistivity and corresponding magnetic susceptibility drop at around 10-14 K. The Fe1.1Se0.33Te0.67 sample shows the highest onset Tc of about 14 K, and its upper critical field is estimated to be approximately 54 T. Compared with conventional solid state reaction for preparing polycrystalline FeSe samples, combustion synthesis exhibits much-reduced time and energy consumption, but offers comparable superconducting properties. It is expected that the combustion synthesis method is available for preparing plenty of iron-based superconductors, and in this direction further related work is in progress.
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