【摘要】 在室温至77K范围内,测量了YBa₂Cu₃O₇高T_c超导体中Cu的核四极共振的自旋晶格弛豫时间.磁化矢量的增长服从单指数规律,自旋晶格弛豫主要由于磁偶极相互作用.弛豫时间与温度的关系,在T.以上可近似用T₁T^0.5=常数拟合,在T.以下,未观察到经典BCS超导体的弛豫行为.更多还原

【Abstract】 The spin lattice relaxation time of high T_c super-conductor YBa₂Cu₃O₇ was measured in the interval from room temperature to 77 K.The magnetization was increased exponentially.The machenism of spin lattice relaxation was mainly due to the magnetic dipole dipole interaction.The relation between T₁ and T can be simulated by the equation T₁T^0.5=Const.above T_c, and below T_c the classical BCS superconductor behavior was not found.更多还原