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

doi:10.1063/1.1687987

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 journal › Article › peer-review

96 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 language	English (US)
Pages (from-to)	5244-5246
Number of pages	3
Journal	Journal of Applied Physics
Volume	95
Issue number	9
DOIs	https://doi.org/10.1063/1.1687987
State	Published - May 1 2004
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy

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10.1063/1.1687987

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

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.",

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N2 - 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.

AB - 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.

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

Abstract

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