NDLI: The modification of the initial susceptibility of dilute binary ferrofluids based on γ-Fe2O3/ZnFe2O4 nanoparticles

Content Provider	Springer Nature Link
Author	Fu, Jun Li, Jian Lin, Yueqiang Liu, Xiaodong Lin, Lihua Chen, Longlong
Copyright Year	2012
Abstract	In the dilute γ-Fe2O3–ZnFe2O4 binary ferrofluids, the magnetic interaction between γ-Fe2O3 nanoparticles is large enough to form aggregates. The magnetization behavior of the binary ferrofluids with ϕ γ =0.4 % and ϕ Zn=0.1 %, 0.2 %, or 0.4 % are investigated. The magnetism of ZnFe2O4 nanoparticles is very weak so the magnetization behavior of the binary ferrofluids results mainly from the γ-Fe2O3 nanoparticle system. Experimental results indicate that the initial susceptibility of the binary ferrofluids with ϕ Zn=0.4 % is the smallest, although that with ϕ Zn=0.2 % is larger than the one with ϕ Zn=0.1 %. In addition, at high field, the magnetization of the ferrofluid with ϕ Zn=0.4 % is greatest. These results show that both chain-like and ring-like aggregates of γ-Fe2O3 particles are stimulated by the ZnFe2O4 particle system. The contributions of the two types of aggregate in the magnetization process are different. The ratio of these aggregates varies nonmonotonically with ϕ Zn, so as ϕ Zn increases; the weak magnetic ZnFe2O4 particle system produces a nonmonotonic modification of the initial susceptibility of these binary ferrofluids.
Starting Page	155
Ending Page	160
Page Count	6
File Format	PDF
ISSN	09478396
Journal	Applied Physics A
Volume Number	108
Issue Number	1
e-ISSN	14320630
Language	English
Publisher	Springer-Verlag
Publisher Date	2012-03-21
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Condensed Matter Physics Optical and Electronic Materials Surfaces and Interfaces, Thin Films Nanotechnology Operating Procedures, Materials Treatment Characterization and Evaluation of Materials
Content Type	Text
Resource Type	Article
Subject	Chemistry Materials Science

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