Rare earth reduced garnet systems and related microwave applications

摘要

Disclosed are synthetic garnets and related devices that can be used in radio-frequency (RF) applications. In some embodiments, such RF devices can include garnets having reduced or substantially nil Yttrium or other rare earth metals. Such garnets can be configured to yield high dielectric constants, and ferrite devices, such as TM-mode circulators/isolators, formed from such garnets can benefit from reduced dimensions. Further, reduced or nil rare earth content of such garnets can allow cost-effective fabrication of ferrite-based RF devices. In some embodiments, such ferrite devices can include other desirable properties such as low magnetic resonance linewidths. Examples of fabrication methods and RF-related properties are also disclosed.

主权项

1. A synthetic garnet material comprising a structure including dodecahedral sites, Bismuth occupying at least some of the dodecahedral sites, the garnet material having a dielectric constant value of at least 21, the synthetic garnet material being substantially free of rare earth and having the formula Bi1.4Ca1.6Zr0.55V0.525Fe3.925O12.