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我们研制了YBa<sub>2</sub>(Cu<sub>1-x</sub>Sn<sub>x</sub>)3O<sub>7-δ</sub>超导体,其中 x=0.01,0.02,0.03,0.04,0.05.发现当 x=0.03时,零电阻温度达92K.但是经过适当剂量中子和γ-射线辐照后,该样品零电阻温度达101.4K.