Magnetostatic propagation for uniform normally-magnetized multilayer planar structures
Magnetostatic propagation in layered structures with magnetization in the plane and perpendicular to the direction of propagation has been studied theoretically and experimentally. Problems in device application of this geometry include low power saturation levels and limited delay times for reasonable film sizes. Both problems are minimized by use of normal magnetization giving volume modes having isotropic propagation in the film plane. This work reports theoretical and experimental studies for a normally-magnetized ground plane-dielectric-YIG-dielectric-ground plane structure. The dispersion relation is derived for the magnetostatic limit and this geometry. This theory indicates that with at least one ground plane within a magnetostatic wavelength of the YIG, significant modification of the dispersion characteristic can be obtained. Nondispersive regions of approximately 10 percent bandwidths are predicted. Experimental studies with an LPE-YIG film thickness of 10 ..mu..m and a dielectric thickness of 8 to 20 times the YIG thickness show nondispersive propagation over bandwidths greater than 100 MHz at 1.6 GHz. Agreement between theory and experiment is good. Saturation characteristics are better than those of similar magnetostatic surface wave devices.
- Research Organization:
- Univ. of Texas, Arlington
- OSTI ID:
- 7330756
- Journal Information:
- AIP (Am. Inst. Phys.) Conf. Proc.; (United States), Vol. 34; Conference: Joint international magnetism and magnetic materials intermag conference, Pittsburgh, PA, USA, 15 Jun 1976; Other Information: See CONF-760619--
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
FERRITE GARNETS
MAGNETIZATION
YTTRIUM COMPOUNDS
CRYSTAL GROWTH
DIELECTRIC MATERIALS
DIELECTRIC PROPERTIES
DISPERSION RELATIONS
EPITAXY
FILMS
LAYERS
WAVE PROPAGATION
ELECTRICAL PROPERTIES
MINERALS
PHYSICAL PROPERTIES
TRANSITION ELEMENT COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties