使用安装在SQUID磁力计中的微型3 He低温恒温器和封闭循环3 He气体处理系统，可精确测量高达500 mK的磁化强度，无需连续冷却功能
Precise magnetization measurements down to 500 mK using a miniature 3He cryostat and a closed-cycle 3He gas handling system installed in a SQUID magnetometer without continuous-cooling functionality
摘要：
我们已经进行了精确的磁化强度测量到0.5 K的微型3 He低温恒温器和封闭循环3 He气体处理系统的商业超导量子干涉装置磁强计[磁性能测量系统（量子设计）]。气体处理系统包含两个充满颗粒炭的吸附泵。我们将3 He气体加压到环境压力以在3 K下液化，然后泵送蒸发器进行冷却。样品的最低温度为~ 0.5K，可持续34 h。我们通过观察铝在超导转变温度~ 1 K以下的迈斯纳效应来证明系统的性能。我们还测量了重费米子超导体CeCoIn_5的磁化曲线，成功地观测到了0.5K下的低临界场。
英文摘要：
We have conducted precise magnetization measurements down to 0.5 K with a miniature 3He cryostat and a closed-cycle 3He gas handling system for a commercial superconducting quantum interference device magnetometer [Magnetic Property Measurement System (Quantum Design)]. The gas handling system contains two sorption pumps filled with granular charcoals. We pressurize 3He gas up to ambient pressure for the liquification at 3 K and then pump the vaper for cooling. The lowest sample temperature is ~ 0.5 K and it can persist for 34 hours. We demonstrate the performance of the system by observing the Meissner effect of aluminum below the superconducting transition temperature ~ 1 K. We also measured the magnetization curve of the heavy fermion superconductor CeCoIn5 resulting in successful observation of the lower critical field at 0.5 K.
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