Molecular Beam Epitaxial Growth of GaAs on Gadolinium-Gallium Garnet.

摘要

Over the past decade there has been considerable interest in devices using ferrimagnetic garnets. Of particular interest are microwave non-reciprocal devices such as circulators and isolators, and devices based on the propagation of a magnetostatic wave (MSW) in films of these materials. Circulators, which are used to isolate different parts of an electromagnetic circuit, are the most employed microwave component. Ferrimagnetic garnet circulators which have operated at frequencies up to 22 GHz have low insertion losses. Also, several MSW components such as delay lines, filters, resonators, correlators and convolvers have been realized and used for analog signal identification, control and processing. These components enable a substantial reduction in the device size required for long delays because MSWs travel with velocities two to four orders of magnitude slower than electromagnetic waves.