Magnetization relaxation of uniaxial anisotropic ferromagnetic particles with linear reaction dynamics driven by DC/AC magnetic field  

作　　者：Yu-Song Hu Min Jiang Tao Hong Zheng-Ming Tang Ka-Ma Huang 胡玉松;江敏;洪涛;唐正明;黄卡玛(School of Electronic Information Engineering,China West Normal University,Nanchong 637000,China;College of Electronics and Information Engineering,Sichuan University,Chengdu 610065,China)

机构地区：[1]School of Electronic Information Engineering,China West Normal University,Nanchong 637000,China [2]College of Electronics and Information Engineering,Sichuan University,Chengdu 610065,China

出　　处：《Chinese Physics B》2021年第9期89-93,共5页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.62001398 and 61731013);the China West Normal University of Sichuan,China(Grant Nos.416681 and 416682).

摘　　要：The response of uniaxial anisotropic ferromagnetic particles with linear reaction dynamics subjected to alternating current(AC)or direct current(DC)bias magnetic field is evaluated by the reaction-diffusion equation for the probability distribution function of the molecular concentration in the spherical coordinate system.The magnetization function and the probability distribution function of the magnetic particles in the reaction system are derived by using the Legendre polynomials and Laplace transform.We discuss the characteristics of magnetization and probability distribution of the magnetic particles with different anisotropic parameters driven by a DC and AC magnetic fields,respectively.It is shown that both the magnetization and the probability distribution decrease with time increasing due to the reaction process.The uniformity of the probability distribution and the amplitude of the magnetization are both affected by the anisotropic parameters.Meanwhile,the difference between the case with linear reaction dynamics and the non-reaction case is discussed.

关 键 词：linear reaction probability distribution MAGNETIZATION ANISOTROPIC 

分 类 号：O469[理学—凝聚态物理]