STUDIES IN MICROWAVE PHYSICS.
Abstract
Studies on the breakdown strength of high pressure gases at microwave frequencies and the interaction of high microwave powers with plasmas were initiated. Design of suitable microwave cavities are discussed and construction details are presented. Preliminary measurements and complete construction details are presented. Theoretical arguments show that the magnetization of a thin ferromagnetic film should decrease with thickness, going to zero for a two dimensional film. An attempt was made to observe the thickness variation in a ferrite, NiFe2O4, by means of ferromagnetic resonance. A method was found by which we could make films of uniform composition, but the formation of air pores could not be prevented. A decrease in magnetization in the films of apparent thickness was observed below about 6000A. Though the measured magnetization could not be corrected for porosity in an exact manner, the tabulated results indicate qualitatively how the transition from bulk takes place. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1964
- Accession Number
- AD0608128
Entities
People
- Herman Farber
- Leo M. Silber
Organizations
- New York University Tandon School of Engineering