Title :
Synthesis and property of core-shell Ag@Fe3O4 nanoparticles
Author :
Lai, Chih-Huang ; Wu, Tsung-Feng ; Lan, Ming-Der
Author_Institution :
Dept. of Mater. Sci. & Eng., Nat. Tsing Hua Univ., Hsinchu, Taiwan
Abstract :
Ag nanoparticles with Fe3O4 shells have been synthesized by the polyol method. The Ag@Fe3O4 core-shell nanoparticles exhibited a superparamagnetic behavior at the temperature higher than the blocking temperature (100 K) and showed shifted loops under a field cooling process. The enhanced magnetic anisotropy was observed and was ascribed to the surface effect.
Keywords :
ferromagnetic materials; iron compounds; magnetic anisotropy; materials preparation; nanoparticles; silver; superparamagnetism; Ag; Fe3O4; blocking temperature; core shell nanoparticles; magnetic anisotropy; polyol method; superparamagnetism; surface effect; Cooling; Iron; Magnetic anisotropy; Magnetic cores; Magnetic properties; Magnetic separation; Magnetosphere; Nanoparticles; Perpendicular magnetic anisotropy; Temperature; Core-shell structure; Fe; exchange bias; superparamagnetic;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2005.855212
