论文标题
现象学Landau方法在环境压力下的铁磁超导体中的磁相跃迁描述
Application of phenomenological Landau approach to the description of magnetic phase transitions in the ferromagnetic superconductor at ambient pressure
论文作者
论文摘要
我们研究了将现象学方法应用于UGE2中磁过渡的描述的可能性，借助Landau自由能扩展到磁化中的第8阶。该分析表明，对于M^4前方的某些参数值，自由能中的M^6项在低磁化和高磁性阶段之间出现两个连续的相变的可能性，具有相同的结构。我们建立了Landau能量参数的关系，正如实验数据所示，从无序到低磁化阶段的相变为二阶。在我们的近似值中，两个磁有序阶段之间的过渡是一阶
We study the possibility to apply phenomenological approach to the description of magnetic transitions in UGe2 with the help of Landau free energy expanded to 8-th order in magnetisation. The analysis shows that for certain values of parameters in front of M^4, and M^6 terms in the free energy there id possibility for the appearance of two successive phase transitions between the low-magnetisation and high-magnetisation phase with the same structure. We establish the relation of the parameters in Landau energy, for which the phase transition from the disordered to low-magnetisation phase is of second order as the experimental data shows. Within our approximation the transition between two magnetically ordered phases is of first order
