Dynamic hysteresis of a superparamagnetic nanoparticle at low-to-intermediate frequencies

Abstract: Dynamic magnetic hysteresis in a nanoparticle is treated with the aid of Brown''s kinetic equation. The case in question is the one where the period of the external field falls in between the short intrawell and long interwell magnetic relaxation times. Dependencies of the hysteresis loop on the frequency and amplitude of the field and on temperature are found and analyzed. [Copyright &y& Elsevier]