Static Scaling on an Interacting Magnetic Nanoparticle System

T. Jonsson, P. Svedlindh, Mikkel Fougt Hansen

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Abstract

The field dependence of the ac susceptibility of a concentrated frozen ferrofluid containing ultrafine Fe-C particles of monodisperse nature has been analyzed using static scaling. For the first time, a divergent behavior of the nonlinear susceptibility of a dipole-dipole interacting system is demonstrated. From the analysis, the critical exponents gamma = 4.0 +/- 0.2 and beta = 1.2 +/- 0.1 were extracted. The results support the existence of a low temperature spin-glass-like phase in interacting magnetic nanoparticle systems. [S0031-9007(98)07527-9].
Original languageEnglish
JournalPhysical Review Letters
Volume81
Issue number18
Pages (from-to)3976-3979
ISSN0031-9007
DOIs
Publication statusPublished - 1998

Bibliographical note

Copyright (1998) by the American Physical Society.

Keywords

  • SPIN-GLASSES
  • DYNAMICS
  • EQUILIBRIUM
  • SUPERPARAMAGNETISM

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