磁场对磁流体红外吸收的影响

MAGNETIC EFFECT ON INFRARED ABSORPTION OF MAGNETIC FLUID

测量了３种磁流体在施加外磁场前后的红外反射吸收谱，发现磁流体的红外吸收系数随磁粉浓度的增加而增加；在外磁场作用下吸收系数降低，钡铁氧体和锰锌铁氧体磁液随外磁场增强吸收系数单调下降并趋向一渐近值，Ｆｅ－Ｎｉ超微粒磁流体的吸收系数随磁场的变化出现异常．采用链状结构模型和理论可解释上述现象．

in this paper,the reflective infrared absorption spectrums of three magnetic fluids have been studied.The results show the infrared absorption coefficient of the magnetic fluid increases with the concentration of the magnetic powder.However,in the outer magnetic field,with the increase of the magnetic field intensity,the infrared absorption coeffients of the Ba ferrite and Mn-Zn ferrite decrease monotonously and gradually level off;the infrared absorption coeffient of ultrafine Fe-Ni powders magnetic fluid decreases first and gradually becomes quit different from that of the above-mentioned two materials.The zbove experiment curves can be explained by the chain structure model and theory.