节点文献
界面活性剂对Fe3O4磁性与穆斯堡尔谱的影响
THE EFFECT OF SURFACTANT ON THE MAGNETIC PROPERTIES AND MOSSBAUER SPECTRA OF MEGNETITE
【摘要】 测量了不同颗粒尺寸Fe3O4覆盖界面活性剂前后磁性、红外谱以及穆斯堡尔谱。实验结果表明界面活性剂与Fe3O4微粒表面为化学吸附,覆盖界面活性剂后在相同磁场下磁化强度有所下降,穆斯堡尔谱变得弥散,随着颗粒尺寸变小,穆斯堡尔谱内场减小,谱线变得更为弥散,实验结果可以用表面各向异性的理论进行解释。
【Abstract】 The magnetic properties, infrared absorption spectra and Mossbauer spectra of dif f irent size magnetite particles were measured before and after coating with organic surfactant. The experimental results show that the nature of coating is chemical absorption between the fine magnetite particle surface and the surfactant. After coating the specific magnetization is reduced under equal magnetic field condition and Mossbauer spectra become more broadened with the magnetite particle size decreasing. The experimental results may be explained by the surface anisotropy theory.
- 【文献出处】 物理学报 ,Acta Physica Sinica , 编辑部邮箱 ,1982年10期
- 【被引频次】5
- 【下载频次】75