Spontaneous magnetization reversal caused by magnetic fluctuation in GaMnSb thin films

18th Russian Youth Conference on Physics of Semiconductors and Nanostructures, Opto- and Nanoelectronics

Filatov, A.A.^1 ; Ziborov, G.G.^1 ; Dmitriev, A.I.^2

Lomonosov Moscow State University, Moscow

119992, Russia^1

Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka

142432, Russia^2

关键词: Field dependence;    Log-normal distribution;    Logarithmic coordinates;    Magnetic anisotropy energy;    Magnetic fluctuation;    Spontaneous magnetization;    Time dependence;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/816/1/012005/pdf
DOI  :  10.1088/1742-6596/816/1/012005

来源: IOP

【 摘 要 】

Time dependences of the magnetic moment m(t) in GaMnSb thin films with MnSb clusters are measured. The m(t) dependences are straightened in semi-logarithmic coordinates m(lnt). The field dependences of magnetic viscosity S(H) corresponding to the slope of straight lines m(lnt) are studied. It is demonstrated that the behaviour of dependences S(H) is governed by the magnetic moment fluctuations of MnSb clusters with lognormal distribution of the magnetic anisotropy energy.