Title :
The effects of the sputtering conditions on bismuth doped gadolinium iron garnet films
Author :
Eppler, W. ; Kryder, M.H.
Author_Institution :
Magnetics Technol. Center, Carnegie Mellon Univ., Pittsburgh, PA, USA
fDate :
9/1/1989 12:00:00 AM
Abstract :
The effects of sputtering conditions on the magnetic and magnetooptic properties of bismuth-substituted gadolinium-iron-garnet (GdIG) films were studied. GdIG films with uniaxial perpendicular anisotropy and room-temperature coercivities greater than 1 kOe were deposited on glass substrates by RF magnetron sputtering. These films have Faraday rotations (θf) between 0.6°/μm and 1.3°/μm and temperature-dependent coercivities similar to those of rare earth-transition metal alloys. Increasing the RF power or argon bleeding pressure results in an increase in the compensation temperature with little change in the Curie temperature (Tc). A negative substrate bias lowers Tc, lowers θ f, and raises the crystallization temperature
Keywords :
Curie temperature; Faraday effect; bismuth; coercive force; gadolinium compounds; garnets; magnetic anisotropy; magnetic thin films; sputtered coatings; Ar bleeding pressure; Curie temperature; Faraday rotations; GdFe5O12:Bi; GdIG:Bi films; RF magnetron sputtering; RF power; coercivities; compensation temperature; crystallization temperature; garnet; glass substrates; magnetooptic properties; negative substrate; sputtering conditions; uniaxial perpendicular anisotropy; Anisotropic magnetoresistance; Bismuth; Coercive force; Glass; Magnetic films; Magnetic properties; Magnetooptic effects; Radio frequency; Sputtering; Temperature;
Journal_Title :
Magnetics, IEEE Transactions on
