| 5 | Interpretation of thermal dependence of magnetic aftereffect for magnetic nanocomposite with slow decay rates显示文摘A new experimental characterization is presented of time-,field-,and temperature-dependent dynamic effects in magnetization of a nanocomposite which displays slow decay.Field and temperature variations of irreversible susceptibility,χirr,decay coefficient,S,fluctuation field,hf,and activation volume,V,have been calculated for the nanocomposite sample(Co_(80)Ni_(20))using a recently developed modified Preisach–Arrhenius(MPA)model.The sample is composed of non-interacting nanoparticles having negligible reversible magnetization.Non-Arrhenius behavior is observed in both the maximum decay coefficient,Smax,and the fluctuation field,hf,as a function of temperature T.The peak of both temperature curves are identical and occur at a critical temperature Tk of∼50 K,which agrees with our experimental results.Based on the effect of a temperature-dependent chemical potential on energy barrier,hf is studied for T | Shuo Gu Yi Jin Gary R.Kahler Ming Zhang Peijie Chen Mohammadreza Ghahremani Edward Della Torre Lawrence H.Bennett | 2013 | International Journal of Smart and Nano Materials2013，4，2： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员