Accession Number : AD0441104


Title :   HIGH POWER MICROWAVE FERRITES AND DEVICES.


Descriptive Note : Quarterly progress rept. no. 5, 1 Jan-31 Mar 64,


Corporate Author : RAYTHEON CO WALTHAM MA


Personal Author(s) : Schlomann, E ; Green, J J ; Saunders, J ; Booth, A ; Joseph, R


Report Date : 31 Mar 1964


Pagination or Media Count : 29


Abstract : A theory of the demagnetizing field in nonellipsoidal bodies is described. In this theory the total magnetic field is expressed as a series of ascending powers in M/Ho, where M is the saturation magnetization and Ho the applied magnetic field. The general theory has been applied to rectangular prisms. The observation of delayed magneto-elastic signals both in reflection and transmission is reported. A rapid variation of the strength of the signals with dc field was observed and is attributed to the occurrence of magneto-elastic resonance near the end faces of the sample. The material YGFA-9 (composition Y1.9 Gd1.1 Fe4.5 A10.5 O12) has been tested in a waveguide in order to establish more precisely the correlation with cavity measurements on small samples. Reasonably good agreement was obtained. (Author)


Descriptors :   *FERRITES , RESONANCE , GARNET , S BAND , YTTRIUM , GADOLINIUM , IRON , INDIUM , OXIDES , NEODYMIUM , SAMARIUM , HOLMIUM , DYSPROSIUM , TERBIUM , PRASEODYMIUM


Distribution Statement : APPROVED FOR PUBLIC RELEASE