Normalization factors for magnetic relaxation of small particle systems in non-zero magnetic field

Details Normalization factors for magnetic relaxation of small particle systems in non-zero magnetic field Normalization factors for magnetic relaxation of small particle systems in non-zero magnetic field

1997-04-04

arxiv.org/abs/cond-mat/9704042v2

Phys. Rev. B 55, 008940 (1997)

Physics

Condensed Matter

Materials Science

5 pages, 6 eps figures added in April 22, to be published in Phys. Rev. B 55 (1 April 1997)

Scientific paper

10.1103/PhysRevB.55.8940

We critically discuss relaxation experiments in magnetic systems that can be characterized in terms of an energy barrier distribution, showing that proper normalization of the relaxation data is needed whenever curves corresponding to different temperatures are to be compared. We show how these normalization factors can be obtained from experimental data by using the $T \ln(t/\tau_0)$ scaling method without making any assumptions about the nature of the energy barrier distribution. The validity of the procedure is tested using a ferrofluid of Fe_3O_4 particles.

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