1994
DOI: 10.1103/physrevb.49.15374
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Magnetic properties of a frozen ferrofluid: Local-mean-field theory

Abstract: Recent experiments on the magnetic properties of frozen ferroAuids indicate clear deviations from canonical spin glass behavior. To elucidate these differences we present simulations based on a localmean-field theory approach. This theoretical scheme was previously found to be quite successful for traditional spin glass and random field systems. In a parallel fashion we study frustration effects associated with a magnetic dipole-dipole interaction for a random spatial arrangement of Heisenberg spins in a quenc… Show more

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Cited by 10 publications
(8 citation statements)
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“…Simulations based on local-mean-field theory indicate that particle-particle interaction is effective at 1% volume fraction. 5 Our experimental data, however, show a remarkable upward deviation from linearity above 1.2ϫ10 16 particles/cm 3 ͑0.75% volume fraction͒ as plotted in Fig. 3.…”
Section: Resultsmentioning
confidence: 55%
See 1 more Smart Citation
“…Simulations based on local-mean-field theory indicate that particle-particle interaction is effective at 1% volume fraction. 5 Our experimental data, however, show a remarkable upward deviation from linearity above 1.2ϫ10 16 particles/cm 3 ͑0.75% volume fraction͒ as plotted in Fig. 3.…”
Section: Resultsmentioning
confidence: 55%
“…5 From the experimental point of view magnetization measurements have been used to analyze the effect of dipole interaction on the onset of glassy behavior in magnetic fluids. 6 In this article magnetic resonance is presented as a useful technique to study magnetic dipole particle-particle interaction in frozen magnetic fluids.…”
Section: Introductionmentioning
confidence: 99%
“…The irreversible behavior of M(T) to temperatures considerably above T,, as well as the pronounced increase in the FC magnetization with decreasing temperature below Tg, an indication of additional spin degrees of freedom at low T, continues to distinguish quenched ferrofluids from canonical solid-state spin glasses. 6 The addition of local, randomly-oriented magnetic fields may not have changed the qualitative picture from the interactions- Figure 3. Variation of the glass transition temperature T, with large moment fractionf.…”
Section: Resultsmentioning
confidence: 97%
“…Another example of a phase transition that we do not touch here is the emergence of a dipole glass state at low temperatures for systems of dipoles in a solid matrix, like frozen ferrofluids [141,142,143]. The existence of such a state in liquid ferrofluids has been reported, e. g., in [144].…”
Section: Phase Transitionsmentioning
confidence: 99%