Direct observation of cation distributions of ideal inverse spinel CoFe2O4 nanofibres and correlated magnetic properties

Handle URI:
http://hdl.handle.net/10754/623820
Title:
Direct observation of cation distributions of ideal inverse spinel CoFe2O4 nanofibres and correlated magnetic properties
Authors:
Zeng, Xue; Zhang, Junwei; Zhu, Shimeng; Deng, Xia; Ma, Hongbin; Zhang, Junli; Zhang, Qiang; Li, Peng ( 0000-0001-8633-9045 ) ; Xue, Desheng; Mellors, Nigel J; Zhang, Xixiang ( 0000-0002-3478-6414 ) ; Peng, Yong
Abstract:
Low-dimensional spinel ferrites have recently attracted increasing attention because their tunable magnetic properties make them attractive candidates as spin-filtering tunnel barriers in spintronic devices and as magnetic components in artificial multiferroic heterostructures. Although we know that the distribution of cations (Fe3+ and Co2+) in a spinel structure governs its magnetic properties, their distribution in the so-called ideal inverse spinel structure of a ferrite, CoFe2O4, has not yet been imaged with sub-ångstrom resolution. In this work, we fill this gap in evidence by reporting a direct observation of the distribution of cations in an ideal inverse spinel structure of CoFe2O4 nanofibres using aberration-corrected transmission electron microscopy (TEM). The ordering of Co2+ and Fe3+ at the octahedral sites imaged along either [001], [011] or [-112] orientation was identified as 1 : 1, in accordance with the ideal inverse spinel structure. The saturation magnetisation calculated based on the crystal structure as determined from the TEM image is in good agreement with that measured experimentally on the spinel CoFe2O4 nanofibres, further confirming results from TEM.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
Zeng X, Zhang J, Zhu S, Deng X, Ma H, et al. (2017) Direct observation of cation distributions of ideal inverse spinel CoFe2O4 nanofibres and correlated magnetic properties. Nanoscale. Available: http://dx.doi.org/10.1039/c7nr02013a.
Publisher:
Royal Society of Chemistry (RSC)
Journal:
Nanoscale
Issue Date:
25-Apr-2017
DOI:
10.1039/c7nr02013a
Type:
Article
ISSN:
2040-3364; 2040-3372
Sponsors:
This work was supported by the National Natural Science Foundation of China (51571104 and 11274145), the MOST International Cooperation Funds (2014DFA91340), and the Program for Changjiang Scholars and Innovative Research Team in the University (Grant No. IRT1251).
Additional Links:
http://pubs.rsc.org/en/Content/ArticleLanding/2017/NR/C7NR02013A#!divAbstract
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorZeng, Xueen
dc.contributor.authorZhang, Junweien
dc.contributor.authorZhu, Shimengen
dc.contributor.authorDeng, Xiaen
dc.contributor.authorMa, Hongbinen
dc.contributor.authorZhang, Junlien
dc.contributor.authorZhang, Qiangen
dc.contributor.authorLi, Pengen
dc.contributor.authorXue, Deshengen
dc.contributor.authorMellors, Nigel Jen
dc.contributor.authorZhang, Xixiangen
dc.contributor.authorPeng, Yongen
dc.date.accessioned2017-05-31T11:23:07Z-
dc.date.available2017-05-31T11:23:07Z-
dc.date.issued2017-04-25en
dc.identifier.citationZeng X, Zhang J, Zhu S, Deng X, Ma H, et al. (2017) Direct observation of cation distributions of ideal inverse spinel CoFe2O4 nanofibres and correlated magnetic properties. Nanoscale. Available: http://dx.doi.org/10.1039/c7nr02013a.en
dc.identifier.issn2040-3364en
dc.identifier.issn2040-3372en
dc.identifier.doi10.1039/c7nr02013aen
dc.identifier.urihttp://hdl.handle.net/10754/623820-
dc.description.abstractLow-dimensional spinel ferrites have recently attracted increasing attention because their tunable magnetic properties make them attractive candidates as spin-filtering tunnel barriers in spintronic devices and as magnetic components in artificial multiferroic heterostructures. Although we know that the distribution of cations (Fe3+ and Co2+) in a spinel structure governs its magnetic properties, their distribution in the so-called ideal inverse spinel structure of a ferrite, CoFe2O4, has not yet been imaged with sub-ångstrom resolution. In this work, we fill this gap in evidence by reporting a direct observation of the distribution of cations in an ideal inverse spinel structure of CoFe2O4 nanofibres using aberration-corrected transmission electron microscopy (TEM). The ordering of Co2+ and Fe3+ at the octahedral sites imaged along either [001], [011] or [-112] orientation was identified as 1 : 1, in accordance with the ideal inverse spinel structure. The saturation magnetisation calculated based on the crystal structure as determined from the TEM image is in good agreement with that measured experimentally on the spinel CoFe2O4 nanofibres, further confirming results from TEM.en
dc.description.sponsorshipThis work was supported by the National Natural Science Foundation of China (51571104 and 11274145), the MOST International Cooperation Funds (2014DFA91340), and the Program for Changjiang Scholars and Innovative Research Team in the University (Grant No. IRT1251).en
dc.publisherRoyal Society of Chemistry (RSC)en
dc.relation.urlhttp://pubs.rsc.org/en/Content/ArticleLanding/2017/NR/C7NR02013A#!divAbstracten
dc.titleDirect observation of cation distributions of ideal inverse spinel CoFe2O4 nanofibres and correlated magnetic propertiesen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalNanoscaleen
dc.contributor.institutionKey Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000, China. pengy@lzu.edu.cn.en
dc.contributor.institutionNano Materials Group, School of Computing, Science and Engineering, University of Salford, Greater Manchester M5 4WT, UK.en
kaust.authorZhang, Qiangen
kaust.authorLi, Pengen
kaust.authorZhang, Xixiangen
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