【摘要】 我们测量了不同制备条件下的YBa₂Cu₃O_7-y多晶样品的交流磁化率,发现从正常态到超导态的交流磁化率的转变宽度△T_c强烈地依赖于样品的氧含量和结构,磁化率的大小与样品中超导成份的多少有关。更多还原

【Abstract】 We have measured the ac susceptibility of polycrystal YBa2Cu3O7-y samples prepared under various conditions. It is found that △Tc, the width of ac susceptibility transition from normal state to superconducting state, strongly depends on the oxygen content and the structure of the sample. The magnitude of ac susceptibility is relative to the amount of superconducting component in the sample.更多还原