NDLI: Magnetic properties of fluffy Fe@α-Fe2O3 core-shell nanowires.

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Magnetic properties of fluffy Fe@α-Fe2O3 core-shell nanowires.

Content Provider	Europe PMC
Author	Cao, Xiaobing Wang, Weihua Zhang, Xinghua Li, Luyan Cheng, Yahui Liu, Hui Du, Sichao Zheng, Rongkun
Copyright Year	2013
Abstract	Novel fluffy Fe@α-Fe2O3 core-shell nanowires have been synthesized using the chemical reaction of ferrous sulfate and sodium borohydride, as well as the post-annealing process in air. The coercivity of the as-synthesized nanowires is above 684 Oe in the temperature range of 5 to 300 K, which is significantly higher than that of the bulk Fe (approximately 0.9 Oe). Through the annealing process in air, the coercivity and the exchange field are evidently improved. Both the coercivity and the exchange field increase with increasing annealing time (TA) and reach their maximum values of 1,042 and 78 Oe, respectively, at TA = 4 h. The magnetic measurements show that the effective anisotropy is increased with increasing the thickness of theα-Fe2O3 by annealing. The large values of coercivity and exchange field, as well as the high surface area to volume ratio, may make the fluffy Fe@α-Fe2O3 core-shell nanowire a promising candidate for the applications of the magnetic drug delivery, electrochemical energy storage, gas sensors, photocatalysis, and so forth.
ISSN	19317573
Journal	Nanoscale Research Letters
Volume Number	8
PubMed Central reference number	PMC3874774
Issue Number	1
PubMed reference number	24134440
e-ISSN	1556276X
DOI	10.1186/1556-276x-8-423
Language	English
Publisher	Springer
Publisher Date	2013-10-17
Access Restriction	Open
Rights License	This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Copyright © 2013 Cao et al.; licensee Springer.
Subject Keyword	Fe@α-Fe2O3 core-shell nanowires Coercivity Exchange bias
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology Condensed Matter Physics Materials Science

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