巨磁电阻效应及其应用 数据处理.docx

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1、五、实验数据及处理1.GMR模拟传感器的磁电转换特性测量实验数据及由公式B=μ0nI算得的磁感应强度如下表所示：（n=24000匝/m）励磁电流I1(mA)磁感应强度B输出电压U（V）励磁电流I1(mA)磁感应强度B输出电压U（V）10030.159289470.265-100-30.159289470.2639027.143360530.264-90-27.143360530.2628024.127431580.258-80-24.127431580.2567021.111502630.242-70-21.111502630.2406018.095573680.216-60-18.09557

2、3680.2145015.079644740.184-50-15.079644740.1824012.063715790.1489-40-12.063715790.1469309.0477868420.1118-30-9.0477868420.1105206.0318578950.0741-20-6.0318578950.0738103.0159289470.0389-10-3.0159289470.0387000.0088000.0085-10-3.0159289470.0273103.0159289470.0291-20-6.0318578950.0591206.0318578950.06

3、1-30-9.0477868420.0951309.0477868420.0966-40-12.063715790.13224012.063715790.1331-50-15.079644740.16885015.079644740.1691-60-18.095573680.2036018.095573680.204-70-21.111502630.2337021.111502630.233-80-24.127431580.2528024.127431580.251-90-27.143360530.2609027.143360530.260-100-30.159289470.26310030.

4、159289470.252以B为横坐标，输出电压U为纵坐标，作图得：误差分析：（1）在实验操作中，用恒流源调节励磁电流时距离要调到的值总会有部分偏差，其范围在正负0.2mA以内，反应在图像上就是最低处的输出都在y轴上，实际上应当是分别分布在y轴左右两侧的；（2）用恒流源调节励磁电流时，为保证调到需要调到的励磁电流的精确度，会有很小幅度的回调，可能因磁滞现象造成影响；（3）使用Excel表格处理数据的过程中可能会有精度损失；2.GMR的磁阻特性曲线的测量根据实验数据由公式B=μ0nI算得的磁感应强度，由R=U/I算得的电阻如下表所示：（磁阻两端电压U=4V）励磁电流I1(mA)磁感应强度B磁阻电

5、流I（mA）磁阻R（Ω）10030.159289471.9852015.113359027.143360531.9822018.1634718024.127431581.9792021.222847021.111502631.9622038.7359846018.095573681.9352067.1834635015.079644741.9022103.0494224012.063715791.8682141.327623309.0477868421.8332182.214948206.0318578951.7982224.694105103.0159289471.7672263.72382

6、6001.7392300.172513-10-3.0159289471.7512284.408909-20-6.0318578951.782247.191011-30-9.0477868421.8132206.287921-40-12.063715791.8482164.502165-50-15.0796447422123.142251-60-18.095573681.9182085.505735-70-21.111502631.952051.282051-80-24.127431581.972030.456853-90-27.143360531.9812019.182231-100-30.1

7、59289471.9812019.182231励磁电流I1(mA)磁感应强度B磁阻电流I（mA）磁阻R（Ω）-100-30.159289471.9812019.182231-90-27.143360531.982020.20202-80-24.127431581.9722028.397566-70-21.111502631.9582042.900919-60-18.095573681.932072