High-coercivity in α-Fe2O3 formed after annealing from Fe3O4 nanoparticles

Y. Yang; J. B. Yi; X. L. Huang; J. M. Xue; J. Ding

doi:10.1109/TMAG.2011.2159487

High-coercivity in α-Fe₂O₃ formed after annealing from Fe₃O₄ nanoparticles

Y. Yang
, J. B. Yi
, X. L. Huang
, J. M. Xue
, J. Ding^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

17 Scopus citations

Abstract

Hematite particles (α-Fe₂O₃) were synthesized by oxidation of Fe₃O₄ nanoparticles through heat treatment in the atmosphere of 95% N₂ plus 5% O₂. This method can result in an effective fabrication of high-coercivity α-Fe ₂O₃ particles. The Morin transition of the as-prepared α-Fe₂O₃ particles was detected to be 265 K, and a coercivity of 6.2 kOe could be observed at room temperature. The magnetic properties at different temperatures of the as-produced α-Fe ₂O₃ particles were studied.

Original language	English
Article number	6027736
Pages (from-to)	3340-3342
Number of pages	3
Journal	IEEE Transactions on Magnetics
Volume	47
Issue number	10
DOIs	https://doi.org/10.1109/TMAG.2011.2159487
State	Published - Oct 2011
Externally published	Yes

Keywords

Hematite
Morin transition
high coercivity
magnetite

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

Access to Document

10.1109/TMAG.2011.2159487

Cite this

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title = "High-coercivity in α-Fe2O3 formed after annealing from Fe3O4 nanoparticles",

abstract = "Hematite particles (α-Fe2O3) were synthesized by oxidation of Fe3O4 nanoparticles through heat treatment in the atmosphere of 95\% N2 plus 5\% O2. This method can result in an effective fabrication of high-coercivity α-Fe 2O3 particles. The Morin transition of the as-prepared α-Fe2O3 particles was detected to be 265 K, and a coercivity of 6.2 kOe could be observed at room temperature. The magnetic properties at different temperatures of the as-produced α-Fe 2O3 particles were studied.",

keywords = "Hematite, Morin transition, high coercivity, magnetite",

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AU - Yang, Y.

AU - Yi, J. B.

AU - Huang, X. L.

AU - Xue, J. M.

AU - Ding, J.

PY - 2011/10

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AB - Hematite particles (α-Fe2O3) were synthesized by oxidation of Fe3O4 nanoparticles through heat treatment in the atmosphere of 95% N2 plus 5% O2. This method can result in an effective fabrication of high-coercivity α-Fe 2O3 particles. The Morin transition of the as-prepared α-Fe2O3 particles was detected to be 265 K, and a coercivity of 6.2 kOe could be observed at room temperature. The magnetic properties at different temperatures of the as-produced α-Fe 2O3 particles were studied.

KW - Hematite

KW - Morin transition

KW - high coercivity

KW - magnetite

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