Static Scaling on an Interacting Magnetic Nanoparticle System

T. Jonsson, P. Svedlindh, and M. F. Hansen
Phys. Rev. Lett. 81, 3976 – Published 2 November 1998
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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 γ=4.0±0.2 and β=1.2±0.1 were extracted. The results support the existence of a low temperature spin-glass-like phase in interacting magnetic nanoparticle systems.

  • Received 22 April 1998

DOI:https://doi.org/10.1103/PhysRevLett.81.3976

©1998 American Physical Society

Authors & Affiliations

T. Jonsson and P. Svedlindh

  • Department of Materials Science, Uppsala University, Box 534, SE-751 21 Uppsala, Sweden

M. F. Hansen

  • Department of Physics, Building 307, Technical University of Denmark, DK-2800 Lyngby, Denmark

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Vol. 81, Iss. 18 — 2 November 1998

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