Synthesis of Nano Crystalline Ni and Fe by Levitational Gas Condensation Method

Author

Han, B.S. ; Rhee, C.K. ; Lee, M.K. ; Uhm, Y.R.

Author_Institution

Korea Atomic Energy Res. Inst., Daejeon

Volume

42

Issue

11

fYear

2006

Firstpage

3779

Lastpage

3781

Abstract

Nanocrystalline Ni and Fe were synthesized by the levitaional gas condensation (LGC) method using wire feeding (WF) and micron powder feeding (MPF) systems. The magnetic properties have been characterized using a vibrating sample magnetometer (VSM) and Moumlssbauer spectroscopy. The X-ray diffraction and saturation magnetization results indicate the small amount of oxidized phases such as amorphous NiO and Fe₃O₄ on the surface of metal powders. The size and shape of the nano powders were investigated by transmission microscopy (TEM). It was found that particles have a mean crystallite size about 22 and 24 nm for Fe and Ni. The surface effect might influence the magnetic hysterisis behavior of Ni and Fe

Keywords

Mossbauer spectroscopy; X-ray diffraction; amorphous magnetic materials; iron compounds; magnetic hysteresis; magnetometers; nanoparticles; nickel compounds; transmission electron microscopy; Fe₃O₄; Mossbauer spectroscopy; NiO; X-ray diffraction; levitational gas condensation; metal powders; micron powder feeding; nanopowders; saturation magnetization; transmission electron microscopy; vibrating sample magnetometer; wire feeding; Crystallization; Iron; Magnetic levitation; Magnetic properties; Magnetometers; Powders; Saturation magnetization; Spectroscopy; Wire; X-ray diffraction; Levitational gas condensation; nanocrystalline;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2006.884515

Filename

1715693