Low-temperature dynamics of magnetic nanoshells

Bei Zhang, Jinhao Gao, Bing Xu, Xixiang Zhang

Research output: Contribution to journalArticlepeer-review

Abstract

Well and poorly crystallized iron oxide nanoshells (or hollow nanoparticles) were successfully fabricated using the Kirkendall effect in an oxygen and in an air environment using Fe nanoparticles. The low-field, zero-field-cooling (ZFC) and field-cooling (FC), measurements on these two samples indicated that the inter-particle interactions between the well-crystallized nanoshells were much stronger than those in the poorly crystallized nanoshell assembly. However, the memory experiments showed that there was no spin-glass phase in the well-crystallized nanoshell assembly, whereas the signature of the spin-glass phase (or the memory effect) was evident in the poorly crystallized nanoshell assembly. This result suggests that the origin of the spin-glass characteristic observed in the poorly crystallized nanoshells is the existence of the spinglass phase within those particular nanoshells. Copyright © EPLA, 2010.
Original languageEnglish (US)
Pages (from-to)57006
JournalEPL (Europhysics Letters)
Volume91
Issue number5
DOIs
StatePublished - Sep 24 2010

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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