Percolation Model of the Temperature Dependence of Exotic Magnetic Field in Doped Manganese Perovskites
QU Shao-Hua1,2, YAO Kai-Lun1,3, LIU Zu-Li1, FU Hua-Hua1
1Department of Physics, Huazhong University of Science and Technology, Wuhan 430074
2Department of Physics, Xiangfan University, Xiangfan 441053
3International Center for Material Physics, Chinese Academy of Sciences, Shenyang 110015
Percolation Model of the Temperature Dependence of Exotic Magnetic Field in Doped Manganese Perovskites
1Department of Physics, Huazhong University of Science and Technology, Wuhan 430074
2Department of Physics, Xiangfan University, Xiangfan 441053
3International Center for Material Physics, Chinese Academy of Sciences, Shenyang 110015
Abstract： We investigate the magnetic transitions in a (La1-xBx) 2/3Ca1/3MnO3 system, which consists of paramagnetic and ferromagnetic domains, based on a magnetic theoretical percolation model. In the mean-field approximation, the resistance as a function of temperature and magnetic field has been derived analytically and simulated numerically. It is found that the dependence of the critical temperature on magnetic field is linear when applied magnetic field is not too strong. Our theoretical predications are in good agreement with recent experimental observations.
(Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.))
引用本文:
QU Shao-Hua;YAO Kai-Lun;LIU Zu-Li;FU Hua-Hua. Percolation Model of the Temperature Dependence of Exotic Magnetic Field in Doped Manganese Perovskites[J]. 中国物理快报, 2005, 22(10): 2639-2642.
QU Shao-Hua, YAO Kai-Lun, LIU Zu-Li, FU Hua-Hua. Percolation Model of the Temperature Dependence of Exotic Magnetic Field in Doped Manganese Perovskites. Chin. Phys. Lett., 2005, 22(10): 2639-2642.
2005, Vol. 22 
