Accession Number : ADD008617

Title :   Method for Controlling the Resonance Frequency of Yttrium Iron Garnet Films.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Glass,Howard L ; Elliott,Michael T

Report Date : 16 Jun 1981

Pagination or Media Count : 4

Abstract : Heretofore, it has proven to be extremely difficult to control the resonance frequencies using liquid phase epitaxy. However, with the present invention, it has been found that the incorporation of several percent of lead as a substituent alters the lattice parameter of the YIG film thereby controlling the resonance frequency. The lead need not be added to the flux since it is already present. However, by growing the YIG at sufficiently low temperatures, the lead can be incorporated as a substituent for the Yttrium component of the YIG film in amounts as much as several weight percent. Although the incorporation of lead as a substituent for YIG films is well known, its use as a means for controlling resonance frequency by utilizing a particular flux component in combination with specifically controlled growth temperature, has not been previously recognized. The advantages of the present invention are that the flux of LPE melt is simple, the degree of lead incorporation is easily and effectively controlled, and a broad range of lead concentration can be prepared.

Descriptors :   *Patents, *Yttrium iron garnet, *Magnetic resonance, Control, Single crystals, Epitaxial growth, Liquid phases, Thin films, Doping, Lead(Metal)

Subject Categories : Crystallography
      Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE