Indium containing magnetic garnet materials
AssigneeSkyworks Solutions, Inc.
InventorsMichael David Hill, David Bowie Cruickshank
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Abstract
Disclosed are embodiments of synthetic garnet materials for use in radiofrequency applications. In some embodiments, increased amounts of gadolinium can be added into specific sites in the crystal structure of the synthetic garnet by incorporating indium, a trivalent element. By including both indium and increased amounts of gadolinium, the dielectric constant can be improved. Thus, embodiments of the disclosed material can be advantageous in both above and below resonance applications, such as for isolators and circulators.
Claims17
A synthetic garnet material comprising a structure including bismuth, calcium, gadolinium, hafnium, iron, and indium, the synthetic garnet material having a dielectric constant value of at least 35 and the chemical formula BixCas+yGdzY3-s-x-y-zFe5-r-s-yInrHfsZryO12, 0<x≤2.5, 0.3<r≤0.7, and 0<z≤1.0.
A method of manufacturing a synthetic garnet material having a dielectric constant of at least 35, the method comprising:
- blending a raw material including oxides and/or carbonites;
- and
- calcining the blended materials to form a synthetic garnet material having a crystal structure including bismuth, calcium, gadolinium, hafnium, iron, and indium and having a dielectric constant of at least 35 and the chemical formula BixCas+yGdzY3-s-x-y-zFe5-r-s-yInrHfsZryO12, 0<x≤2.5, 0.3<r≤0.7, and 0<z≤1.0.
A radiofrequency device comprising:
- a synthetic garnet material including a structure including bismuth, calcium, gadolinium, hafnium, iron, and indium, the synthetic garnet material having a dielectric constant value of at least 35 and the chemical formula BixCas+yGdzY3-s-x-y-zFe5-r-s-yInrHfsZryO12, 0<x≤2.5, 0.3<r≤0.7, and 0<z≤1.0.
Dependencies are inferred from the claim text.