Giant exchange bias and the vertical shifts of hysteresis loops in γ-Fe2O3-coated Fe nanoparticles

R. K. Zheng, G. H. Wen, K. K. Fung, X. X. Zhang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

89 Scopus citations

Abstract

The core/shell-structured Fe nanoparticles were fabricated and studied for their structural and magnetic properties. Significant shifts in both horizontal and vertical directions were noticed when the magnetic hysteresis loops were measured at low temperature, after the particles were cooled. The coercive field and the exchange-bias field, both enhanced greatly in the field-cooled (FC) loops. It was found that for both horizontal and vertical shifts in the FC hysteresis loops, frozen spins were responsible.

Original languageEnglish (US)
Pages (from-to)5244-5246
Number of pages3
JournalJournal of Applied Physics
Volume95
Issue number9
DOIs
StatePublished - May 1 2004
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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