Anmutual inductance bridge was employed for the susceptibility measurements. The temperature was determined with a copper-constantan thermocouple and an Allen-Bradley carborn resistor in the 4.2-300 K temperature range. Fig.

• 本文描述了测量氧化物超导体的交流磁化率装置；温度可变范围为4.；2K到300K；室温可换样品。