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Time dependent magnetization of a system of fine cobalt particles

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JournalIEEE Transactions on Magnetics
DatePublished - Nov 1981
Issue number6
Volume17
Pages (from-to)2943-29452
Original languageEnglish

Abstract

Measurements are presented which show that the magnetisation of a system of fine cobalt particles at 77°K is time dependent. The system examined in this work is of fine cobalt particles with median diameter Dv= 70 Å dispersed in toluene. The particles have been found to be in the fcc phase. The time decay of magnetisation has been found to be logarithmic. The time dependence coefficientA = -d\bar{I}/dLntvaries with the applied field H and is a maximum for H = Hcthe coercive force. These observations are in good agreement with the theory presented in this paper.

    Research areas

  • Cobalt, Anisotropic magnetoresistance, Particle measurements, Magnetic anisotropy, Perpendicular magnetic anisotropy, Saturation magnetization, Time measurement, Coercive force, Volume relaxation, Magnetic field measurement

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