磁阻效应实验数据处理范例.docx

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1、精品文档磁阻效应实验数据处理范例一、数据处理1．测定励磁电流和磁感应强度的关系。自设表格记录励磁电流UH1(mV)正向、UH1(mV)反向、UH1(mV)平均，并算出对应的BUH1平均1000KHIH，根据表格中的数据画出IM-B关系曲线。磁感应强度表1：励磁电流和磁感应强度的关系IMmA01002003004005006007008009001000UH1正向mV11.165.9122.0178.0234.5290.4345.7401.1454.9508.4558.7UH1反向mV11.1-45.3-101.8-157.7-213.8-269.8-325.

2、2-380.7-434.8-488.3-539.1UH1平均mV055.6111.9167.8224.2280.1335.4390.9444.8498.4548.9BmT0105211316422527632736838939103411001000900800700)600Tm500(B400300200100020040060080010000IM(mA)图1：IMB关系曲线*选做：利用最小二乘法线性拟合得到励磁电流IM(mA)与磁感应强度B(mT)关系为：B1.04IM3.78线性拟合相关系数R0.999922．测量磁感应强度和磁阻变化的关系。。1欢迎

3、下载精品文档自设表格记录IM(mA)、UH(mV)平均、IH(mA)、U2(mV)、I2(mA)，算出相应的B、R(B)、R/R(0)，并根据表格中数据作B和R/R(0)关系曲线。有关计算公式如下：UH(mV)平均BKHI1(mA)，式中K177mVmATR(B)U2I2，当IM(mA)＝0时，算得R(0)U2I2，RR(B)R(0)。表2：磁感应强度和磁阻变化关系GaAsInSbBR/R0IMUH1正向(mV)UH1反向UH1平均(mV)I1U2I2BR(B)R/R(0)(mA)(mV)(mA)(mV)(mA)（T）（）06.16.102.52800.52

4、.52031803014.2-2.88.52.47800.32.470.0193240.024016.5-5.611.02.44800.52.440.02563280.0325018.7-8.113.42.40800.32.400.03153330.0506021.1-10.715.92.35800.62.350.03823410.0727023.1-12.918.02.31800.12.310.04403460.0908025.3-15.220.22.25800.62.250.05083560.129027.4-16.722.02.20800.52.200

5、.05663640.1410029.2-18.523.82.14800.12.140.06303740.1811030.9-20.325.62.08800.22.080.06953850.2112032.7-21.727.22.02800.32.020.07613960.2513034.5-22.328.41.97800.31.970.08144060.2814036.5-23.730.11.91800.51.910.08904190.31915037.6-24.931.21.86800.61.860.09494300.35516039.8-25.632.7

6、1.81800.61.810.1024420.39217041.2-26.533.81.78800.61.780.1074500.41618043.0-28.035.51.74800.71.740.1154600.44919044.5-29.336.91.72801.41.720.1214660.46720045.8-30.838.31.69800.71.690.1284740.49225052.8-38.445.61.61800.31.610.1604970.56530059.4-45.752.61.55800.81.550.1925170.6263506

7、5.9-52.659.21.49801.11.490.2255380.69240072.0-59.265.61.45800.91.450.2565520.73945077.6-65.371.41.40800.61.400.2885720.80050082.9-70.976.91.35800.71.350.3225930.86755087.7-76.181.91.31800.91.310.3536110.92560092.0-80.986.41.27800.51.270.3846300.984。2欢迎下载精品文档65096.1-85.390.71.23800.

8、21.230.4176501.05700100.1-