RESEARCH AND DEVELOPMENT OF YTTRIUM IRON GARNET SINGLE CRYSTALS
Abstract
Yttrium iron garnet (YIG) single crystals 1/4 to 3/8 in. diameter with about 10 dielectric constant and 0.002 dissipation have been produced by the floating zone technique. Ferrimagnetic resonance line widths of 1 to 2 oersteds were obtained from polished test spheres. Successful experiments with Ga, Gd, and Sm-substituted YIG demonstrated the feasibility of the same technique for growing Ga or rare earth-substituted garnets. Experiments with YIG indicate that the floating zone technique can be modified to use oxygen pressure to 25 atmospheres, automatic control of temperature and zoning rate, and an effective growth rate of at least 0.20 in./hr. Thermal cracking is still a major problem, but YIG crystals 1/2-in. diam by 1-in. long can be produced by improved techniques. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 13, 1961
- Accession Number
- AD0263638
Entities
People
- E.l. Johnson
- L.l. Abernethy
Organizations
- Texas Instruments