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【求助】關(guān)于四氧化三鐵的磁性問(wèn)題 已有1人參與
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| 我做了一些10nm大小的四氧化三鐵,測(cè)出是超順磁性的,但是與聚合物通過(guò)溶液共混(80度左右)后所得的復(fù)合材料測(cè)出來(lái)卻是有磁滯回的,請(qǐng)問(wèn)這可能是什么原因造成的呢? |
銀蟲(chóng) (小有名氣)
| 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. |
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