The synthesis and magnetic properties of monodispersed single-domain nickel nanospheres and highly globular nanostructures of NicoreNiO shell

Xiansong Liu; Udi Meridor; Peng Zhao; Gongbao Song; Aviad Frydman; Aharon Gedanken

doi:10.1016/j.jmmm.2005.06.009

The synthesis and magnetic properties of monodispersed single-domain nickel nanospheres and highly globular nanostructures of Ni_coreNiO _shell

Xiansong Liu, Udi Meridor, Peng Zhao, Gongbao Song, Aviad Frydman, Aharon Gedanken

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

18 Scopus citations

Abstract

Monodispersed single-domain nickel nanospheres have been successfully prepared by the microwave-assisted (MW) polyol method. TEM and AFM analysis reveal that the nickel nanospheres have a size distribution in the 100-180 nm range. Highly globular nanostructures of Ni_coreNiO_shell are achieved by oxidizing the nickel nanospheres in a flow of H ₂O₂ and the structure is studied by means of TEM, XPS, and EDAX. The single-domain magnetic structure is confirmed by MFM measurements and the ferromagnetic properties are demonstrated by VSM and SQUID studies. Surprisingly, no shift in the magnetization loop is observed despite the ferromagnet/antiferromagnet interface. This is attributed to the relatively large volume of our nanoparticles.

Original language	English
Pages (from-to)	13-21
Number of pages	9
Journal	Journal of Magnetism and Magnetic Materials
Volume	301
Issue number	1
DOIs	https://doi.org/10.1016/j.jmmm.2005.06.009
State	Published - Jun 2006

Bibliographical note

Funding Information:
This work was supported by the Key Program of the Education Department of Anhui Province under Grant no. 2005KJ033ZD.

Keywords

Core-shell structures
Magnetic properties
Polyol reaction

Access to Document

10.1016/j.jmmm.2005.06.009

Cite this

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title = "The synthesis and magnetic properties of monodispersed single-domain nickel nanospheres and highly globular nanostructures of NicoreNiO shell",

abstract = "Monodispersed single-domain nickel nanospheres have been successfully prepared by the microwave-assisted (MW) polyol method. TEM and AFM analysis reveal that the nickel nanospheres have a size distribution in the 100-180 nm range. Highly globular nanostructures of NicoreNiOshell are achieved by oxidizing the nickel nanospheres in a flow of H 2O2 and the structure is studied by means of TEM, XPS, and EDAX. The single-domain magnetic structure is confirmed by MFM measurements and the ferromagnetic properties are demonstrated by VSM and SQUID studies. Surprisingly, no shift in the magnetization loop is observed despite the ferromagnet/antiferromagnet interface. This is attributed to the relatively large volume of our nanoparticles.",

keywords = "Core-shell structures, Magnetic properties, Polyol reaction",

author = "Xiansong Liu and Udi Meridor and Peng Zhao and Gongbao Song and Aviad Frydman and Aharon Gedanken",

note = "Funding Information: This work was supported by the Key Program of the Education Department of Anhui Province under Grant no. 2005KJ033ZD.",

year = "2006",

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AU - Liu, Xiansong

AU - Meridor, Udi

AU - Zhao, Peng

AU - Song, Gongbao

AU - Frydman, Aviad

AU - Gedanken, Aharon

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AB - Monodispersed single-domain nickel nanospheres have been successfully prepared by the microwave-assisted (MW) polyol method. TEM and AFM analysis reveal that the nickel nanospheres have a size distribution in the 100-180 nm range. Highly globular nanostructures of NicoreNiOshell are achieved by oxidizing the nickel nanospheres in a flow of H 2O2 and the structure is studied by means of TEM, XPS, and EDAX. The single-domain magnetic structure is confirmed by MFM measurements and the ferromagnetic properties are demonstrated by VSM and SQUID studies. Surprisingly, no shift in the magnetization loop is observed despite the ferromagnet/antiferromagnet interface. This is attributed to the relatively large volume of our nanoparticles.

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