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The remanence ratio in CoFe2O4 nanoparticles with approximate single-domain sizes
Xu,Shitao1,2; Ma,Yongqing1; Geng,Bingqian1; Sun,Xiao1; Wang,Min1
Corresponding AuthorMa,Yongqing(yqma@ahu.edu.cn)
2016-10-22
Source PublicationNanoscale Research Letters
ISSN1931-7573
Volume11Issue:1
AbstractAbstractApproximately single-domain-sized 9-, 13-, and 16-nm CoFe2O4 nanoparticles are synthesized using the thermal decomposition of a metal-organic salt. By means of dilution and reduction, the concentration, moment, and anisotropy of nanoparticles are changed and their influence on the magnetic properties is investigated. The relation of Mr/Ms?∝?1/lgHdip is observed, where Mr/Ms is the remanence ratio and Hdip is the maximum dipolar field. Especially, such relation is more accurate for the nanoparticle systems with higher concentration and higher moment, i.e., larger Hdip. The deviation from Mr/Ms?∝?1/lgHdip appearing at low temperatures can be attributed to the effects of surface spins for the single-phase CoFe2O4 nanoparticles and to the pinning effect of CoFe2O4 on CoFe2 for the slightly reduced nanoparticles.Graphical AbstractApproximately single-domain-sized 9-, 13-, and 16-nm CoFe2O4 nanoparticles were synthesized and then the concentration, moment, and anisotropy of these NPs were changed. The correlation of Mr/Ms?∝?1/lgHdip was observed, independent of the size, concentration, moment, and anisotropy, and especially, such correlation is more accurate for the nanoparticle systems with higher concentration or moment, i.e., stronger dipolar interaction, which has not been reported before as far as we know.
KeywordCoFe2O4 nanoparticles Remanence ratio Dipolar interaction Surface spins
DOI10.1186/s11671-016-1691-3
Language英语
WOS IDBMC:10.1186/s11671-016-1691-3
PublisherSpringer US
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Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/80464
Collection中国科学院金属研究所
Corresponding AuthorMa,Yongqing
Affiliation1.Anhui University; Anhui Key Laboratory of Information Materials and Devices, School of Physics and Materials Science
2.Huaibei Normal University; School of Physics and Electronic Information
Recommended Citation
GB/T 7714
Xu,Shitao,Ma,Yongqing,Geng,Bingqian,et al. The remanence ratio in CoFe2O4 nanoparticles with approximate single-domain sizes[J]. Nanoscale Research Letters,2016,11(1).
APA Xu,Shitao,Ma,Yongqing,Geng,Bingqian,Sun,Xiao,&Wang,Min.(2016).The remanence ratio in CoFe2O4 nanoparticles with approximate single-domain sizes.Nanoscale Research Letters,11(1).
MLA Xu,Shitao,et al."The remanence ratio in CoFe2O4 nanoparticles with approximate single-domain sizes".Nanoscale Research Letters 11.1(2016).
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