Accession Number : AD0749509

Title :   UHF Ferrites (Garnets).

Descriptive Note : Semiannual technical rept. 1 Jan-30 Jun 72,

Corporate Author : RAYTHEON CO WALTHAM MASS RESEARCH DIV

Personal Author(s) : Van Hook,H. J. ; Green,J. J.

Report Date : SEP 1972

Pagination or Media Count : 47

Abstract : Polycrystalline vanadate garnets of the type Bi(3-x)Ca(2x)V(x)Fe(5-x)O(12) where 1.30 < or = x < or = 1.40 were produced by conventional ceramic processing and firing techniques. Microwave properties and hysteresis loop data were generated on all materials and some preliminary correlations of properties with microstructure have been attempted. Single crystals of Calvanbig in the same composition range were grown by the flux technique. Information on composition obtained from the electron microprobe and FMR linewidth (Delta H = 1.5 Oe) X-band indicate the single crystals are chemically homogeneous and of good quality. (Author)

Descriptors :   (*GARNET, MAGNETIC PROPERTIES), (*WAVEGUIDE CIRCULATORS, MICROWAVE EQUIPMENT), (*PHASE SHIFT CIRCUITS, FERRITES), CRYSTAL GROWTH, BISMUTH COMPOUNDS, CALCIUM COMPOUNDS, VANADIUM COMPOUNDS, ULTRAHIGH FREQUENCY, YTTRIUM COMPOUNDS, MICROWAVE FREQUENCY, S BAND

Subject Categories : Electrical and Electronic Equipment
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE