铁磁晶体磁学参量的稳定性分析  

Stability analysis of the magnetic parameters for the ferromagnetism crystal

作　　者：陶冶[1] 

机构地区：[1]长江师范学院物理学与电子工程学院

出　　处：《重庆文理学院学报（自然科学版）》2010年第3期33-37,共5页Journal of Chongqing University of Arts and Sciences

摘　　要：根据Ising模型求解了铁磁晶体的磁化强度和磁化率,用斜率比较法分析了直接影响磁化取向的参量的取值情况,讨论了弱外场对定态磁化参量的影响机制.结果发现:在弱外场较小时,系统与无外场时的情况类似,也有两个稳定取向和一个不稳定取向;当平均场取下值点时,所有的N+和N-随弱外场变化的两条曲线相交于坐标轴的左边,磁化强度比的零点左移;当平均场取上值点时,所有的N+和N-随弱外场变化的两条曲线相交于坐标轴的右边,磁化强度比的零点右移;随着外场B的增加,磁化率不断减少;随着温度的升高,磁化率不断增加.The magnetization strength and the magnetic susceptibility of the ferromagnetism crystal are solved by the Ising model.The method of slope comparison is used to analyze the parameter value which directly affects the magnetizing orientation.Influence mechanism of weak extra magnetic field for steady state magnetizing parameter is discussed.The results show that it has two stable orientations and one instable orientation when extra magnetic is weak and it is similar without the extra magnetic.Two curves of N＋ and N-change with the weak extra magnetic all intersect in the left side of coordinate and the zero point of magnetization strength is left shift when the mean field takes the lower value.Two curves of N＋ and N-change with the weak extra magnetic all intersect in the right side of coordinate and the zero point of magnetization strength is right shift when the mean field takes the higher value.Magnetic susceptibility decreases with the strengthening of the extra magnetic field.Magnetic susceptibility increases with the increasing of temperature.

关 键 词：铁磁晶体 磁化强度 磁化率 稳定性 

分 类 号：O411[理学—理论物理]