Interactions between single domain particles

Roger Proksch, Bruce Moskowitz

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

We present a variation of the Wohlfarth-Henkel technique for studying interactions in single domain particles (SDPs) in which samples are prepared in different remanent states before the remanent magnetization curves are measured. By analyzing the resulting series of switching field distributions (SFDs), it is possible to separate the effects of positive (magnetizing) and negative (demagnetizing) interactions, even when one type dominates the other. The method is applied to two types of samples consisting of uniform SPDs of magnetite produced by magnetotactic bacteria: (1) whole bacterial cells containing single, linear chains of SDPs; and (2) SDPs extracted from the cells and allowed to aggregate into clumps.

Original languageEnglish (US)
Pages (from-to)5894-5896
Number of pages3
JournalJournal of Applied Physics
Volume75
Issue number10
DOIs
StatePublished - 1994

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