Title :
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
fDate :
9/1/1997 12:00:00 AM
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;
Journal_Title :
Magnetics, IEEE Transactions on
