Memory effects in a nanoparticle system: Low-field magnetization and ac susceptibility measurements

R. K. Zheng*, Hongwei Gu, Bing Xu, Xixiang Zhang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

38 Scopus citations

Abstract

A dilute magnetic liquid with Co nanoparticles with an average diameter of 5 nm in hexane has been studied systematically following the experimental approach proposed recently for observing memory effects in magnetic nanoparticles. All phenomena reported previously have been observed, which were earlier ascribed to the memory effect. However, the standard experiments for observing memory effects (low frequency as susceptibility and low field dc magnetization measurements) do not show the memory effect. To understand those observations, very detailed physical pictures, based on the relaxation of the individual particle, are proposed here.

Original languageEnglish (US)
Article number014416
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume72
Issue number1
DOIs
StatePublished - Oct 27 2005

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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