以Pt电阻温度传感器（Pt-111）为研究对象，研究了其在0-16T磁场下、4．2-300K温区内的磁致电阻效应．结果表明：Pt-111在0～16T场强、4．2-77K温区内，磁效应随场强的增加和温度的降低而明显升高，77～300K温区内温度计受磁场的影响较小，其中在16T下，4．2K和300K处的磁效应分别为48．2％和1．07％；在4．2—77K温区，Pt-111由磁阻引起的测量误差场强的升高和温度的降低而明显升高，在16T、4．2K处和16T、77K处的温度测量误差分别为18．3K和1．69K．Pt-111不推荐应用在77K以下的磁场环境．
The magnetoresistance of Platinum resistance thermometer（Pt-111） for temperatures from 4. 2 to 300 K and in magnetic fields up to 16T was described. The magnetoresistance of Pt-111 increases obviously with the in- crease of magnetic fields and decrease of temperature between 4. 2and 77K, and is little above 77K. The magnetoresistance is 48. 2%at 4. 2K and 16T. , and is 1.07% at 300K and 16T. The temperature error arising from magneto- resistance increases with magnetic fields and decreases with temperature between 4. 2 and 77K, and it＇s 18. 3K at 4. 2K and 16T,1.69K at 77K and 16T. The Pt-lll is not recommended for use below 77K in magnetic fields.
参考文献
| [1] | 郭树权.强磁场下的温度控制与测量[J].物理,1988(08):502. |
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