Effects of film thickness and droplets on magnetic properties of SmFeN films prepared by laser ablation technique

Author

Song, Joe Man ; Sadakata, Hiroyuki ; Nakano, M. ; Kanai, Yasuhia ; Fukunaga, Hirotoshi ; Koh, Jae Gui

Author_Institution

Fac. of Eng., Nagasaki Univ., Japan

Volume

35

Issue

5

fYear

1999

fDate

9/1/1999 12:00:00 AM

Firstpage

3052

Lastpage

3054

Abstract

SmFeN film magnets were prepared by the laser ablation technique, and effects of film thickness and droplets on their magnetic properties were studied. An increase in the film thickness increased coercivity. The thermomagnetic analysis and the X-ray photoelectron spectroscopy indicated that the observed increase in the coercivity can be attributed to the suppression of oxidation of Sm. Droplets on film surfaces included a larger amount of Fe than flat parts without droplets and a decrease in the number of droplets results in an increase in coercivity. The coercivity of 6.5 kOe was obtained for the 5 μm thick film with a small number of droplets

Keywords

X-ray photoelectron spectra; coercive force; drops; ferromagnetic materials; iron compounds; magnetic thin films; permanent magnets; pulsed laser deposition; samarium compounds; thermal analysis; 5 mum; SmFeN; SmFeN film magnets; SmFeN films; X-ray photoelectron spectroscopy; coercivity; droplets; film thickness; laser ablation technique; magnetic properties; oxidation; thermomagnetic analysis; Coercive force; Iron; Laser ablation; Magnetic analysis; Magnetic films; Magnetic properties; Magnets; Oxidation; Spectroscopy; X-ray lasers;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.801082

Filename

801082