Exchange bias in plasma-sprayed MnZn ferrite

Author

Yan, Q.Y. ; Gambino, R.J. ; Baumberger, E. ; Lewis, L.H. ; Sampath, Sanjay

Author_Institution

Mater. Sci. & Eng. Dept., Stony Brook Univ., NY, USA

Volume

40

Issue

4

fYear

2004

fDate

7/1/2004 12:00:00 AM

Firstpage

2787

Lastpage

2789

Abstract

The antiferromagnetic phase FeO (wustite) forms in plasma-sprayed MnZn ferrites from pure spinel phase powder. An exchange bias is observed in hysteresis loops of both ferrite coatings and single splats; the exchange bias decreases and disappears with annealing. X-ray diffraction indicates that the wustite FeO changes to hematite Fe₂O₃ upon annealing. Annealing -induced cation ordering and diffusion influence the ferrite magnetic properties by increasing the saturation magnetization and decreasing the coercivity.

Keywords

X-ray diffraction; annealing; antiferromagnetic materials; coercive force; ferrites; hysteresis; magnetisation; manganese compounds; plasma applications; Fe₂O₃; MnZn; MnZn ferrite; X-ray diffraction; annealing; antiferromagnetic phase; cation ordering; coercivity; diffusion; exchange bias; ferrite coatings; ferrite magnetic properties; hematite; hysteresis loops; plasma; pure spinel phase powder; saturation magnetization; single splats; wustite; Annealing; Antiferromagnetic materials; Coatings; Ferrites; Iron; Magnetic hysteresis; Magnetic properties; Plasma x-ray sources; Powders; X-ray diffraction; Exchange bias; MnZn ferrite; plasma-spray;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2004.829295

Filename

1325642