Switchable lossy/non-lossy permalloy thin films

Author

Grimes, Craig A. ; Trouilloud, Philip L. ; Chun, Li

Author_Institution

Dept. of Electr. Eng., Kentucky Univ., Lexington, KY, USA

Volume

33

Issue

5

fYear

1997

fDate

9/1/1997 12:00:00 AM

Firstpage

3996

Lastpage

3998

Abstract

We report on the change in magnetic properties of rf sputtered Ni ₈₁Fe₁₉ films of variable thickness with 0.3×0.3 mm arrays of 100 μm holes defined upon the film using photolithographic processing, and 50 μm and 100 μm diameter holes of variable array density defined using laser ablation. The 10 Hz BH loops, 10 to 500 MHz complex permeability spectra, and domain patterns of patterned, single layer rf sputtered Ni₈₁Fe₁₉ thin films were measured. A switchable lossy/non-lossy regime could be obtained by either adjusting the thickness of the film or spacing of the hole array

Keywords

Permalloy; arrays; coercive force; ferromagnetic materials; laser ablation; magnetic anisotropy; magnetic domain walls; magnetic hysteresis; magnetic leakage; magnetic permeability; magnetic switching; magnetic thin films; photolithography; sputtered coatings; 0.3 mm; 10 Hz; 10 to 500 MHz; 100 mum; 50 mum; BH loops; Ni₈₁Fe₁₉; RF permeability control; complex permeability spectra; domain patterns; film thickness adjustment; hole array spacing; laser ablation; magnetic properties; permalloy thin films; photolithographic processing; rf sputtered Ni₈₁Fe₁₉ films; switchable lossy/nonlossy regime; variable array density; variable thickness; Laser ablation; Magnetic anisotropy; Magnetic fields; Magnetic films; Magnetic properties; Magnetic switching; Optical arrays; Permeability; Sputtering; Transistors;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.619641

Filename

619641