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【求助】关于四氧化三铁的磁性问题 已有1人参与
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| 我做了一些10nm大小的四氧化三铁，测出是超顺磁性的，但是与聚合物通过溶液共混（80度左右）后所得的复合材料测出来却是有磁滞回的，请问这可能是什么原因造成的呢？ |
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| This depends how big the coercivity you got for the composites. If it is really a large coercivity, it may mean something interesting. What is the polymer you used? When you do the mixing, did you use magnetic stirring? One common thing for simple hysteresis measurements, the residue magnetization would introduce some such "ferromagnetic" effect. In this case, you need to run de-magnetization first to remove the residue dipoles. |
2楼2010-05-31 13:12:40