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为了选择合适的磁制冷材料 ,得到材料的磁热效应 ,即 Δ S- T曲线 ,必须测出材料在不同温度下的 M- H曲线。我们采用脉冲磁场的方式提供测试所需的高磁场 ,自行研制了符合测试精度要求的 M- H曲线测试装置 ,测试了金属 Gd的 - 5 0℃～ 5 0℃之间的每隔 10℃的不同温度下的 M- H曲线。
In order to choose the suitable magnetic refrigeration material, get the magnetocaloric effect of the material, namely the ΔS-T curve, must measure the M-H curve of the material under different temperatures. We use a pulsed magnetic field to provide the high magnetic field required for the test. We developed the M-H curve test device that meets the test accuracy requirements and tested every 10 ° C of the metal Gd between -500C and 500C M-H curve at different temperatures.