近年来,在强磁场中进行低温实验的工作日趋增多。其中不少强磁场实验中需要测量温度与磁场函数的物理参量之间的关系。根据实验的性质,测量的方法可以是磁场恒定时观察温度的变化,或温度恒定时研究磁场的影响。但两种方法都存在强磁场中准确测温的问题。蒸汽压温度计,除顺磁性液氧外,虽然基本上可以作到无误差、不受磁场影响的测温,但在不存在可作为蒸汽压温度计的低温液体的那些温度区间,问题则甚为严重。气体温度计提供了一种解决问题的途径,但要把它作为温度的绝对标准,一般认为对多数实验都甚为不便。因此,大多数研究 In recent years, the work of carrying out experiments at low temperatures in high magnetic fields has been increasing. Many of the strong magnetic field experiments need to measure the relationship between temperature and the magnetic field function of the physical parameters. Depending on the nature of the experiment, the method of measurement may be to observe changes in temperature at a constant magnetic field or to study the effect of a magnetic field at a constant temperature. However, both methods suffer from the problem of accurate temperature measurement in a strong magnetic field. Vapor pressure thermometers, in addition to paramagnetic liquid oxygen, provide substantially error-free, temperature-independent measurements of temperature without serious problems in those temperature ranges where cryogenic liquids can be used as vapor pressure thermometers . Gas thermometers provide a solution to the problem, but taking it as an absolute standard of temperature is generally considered inconvenient for most experiments. Therefore, most studies