A Flux Screening Technique for Growth of High-Quality Ferrite Films by Pulsed Laser Deposition

Author

Chen, Yajie ; Lu, Tao ; Zhang, Xiaoyu ; Vittoria, Carmine ; Harris, Vincent G.

Author_Institution

Dept. of Electr. & Comput. Eng., Northeastern Univ., Boston, MA

Volume

42

Issue

10

fYear

2006

Firstpage

2888

Lastpage

2890

Abstract

We present a new technique to improve growth of ferrite films by pulsed laser deposition (PLD). The technique utilizes a metal screen placed between target and substrate, effectively to impede formation of large particulates on the surface of ferrite films by changing the plume shape and plasma density in the PLD chamber. Structural, magnetic, electrical, and microwave properties were measured for the flux screened and conventionally grown films. We demonstrate that the flux screen deposited MnZn-ferrite film has a lower coercivity (39 versus 58 Oe) and ferromagnetic resonance linewidth (350 versus 430 Oe at 9.58 GHz). The improvement in magnetic properties is associated with a reduction in large particulate contamination. This simple approach has the potential to produce high-quality ferrite films for use in electronic and microwave devices

Keywords

ferrites; ferromagnetic resonance; magnetic flux; magnetic thin films; manganese alloys; pulsed laser deposition; 9.58 GHz; MnZn; PLD chamber; electrical properties; ferromagnetic resonance linewidth; flux screen; flux screening technique; high-quality ferrite films; magnetic properties; metal screen; microwave properties; plasma density; pulsed laser deposition; structural properties; Ferrite films; Magnetic films; Magnetic properties; Magnetic resonance; Masers; Optical pulses; Pulsed laser deposition; Shape; Substrates; Surface impedance; Ferrite; ferromagnetic resonance (FMR); pulsed laser deposition (PLD);

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2006.879899

Filename

1704472