MICROWAVE LOSSES IN STRONTIUM TITANATE ABOVE THE PHASE TRANSITION

Abstract

HE MICRO AVE LOSSES IN BOTH PURE AN DOPED SrTiO HAVE B EN INVESTIGATED AS A FUNCTION OF FREQUENCY AND TEMPER TURE. The loss tangent is proportional to frequency in the rang 3 - 36 kMc. Above the phase transition at 110 K, the temperature dep ndence of the loss tangent is well r presen ed by tan delta equals 1/T- SUB C ALPHA b T + gamma (sq T)), where the Curie tempera ure, T sub c equals 37 K. T HE PARA ETER ALPHA IS SHOWN TO BE DETERMI BY L T IC IMPERF CTIONS A D V IS E FOR PURE SINGLE CRYSTALLINE MATERI L H P R M TER BE A A D GAMMA AR I RIN IC PROPERTIE OF THE PERFECT LATTICE AND AR ES EN I LLY UNAFF CTED BY IMPERF C ION I T IS SUGGESTED THAT BET ND GA A RE R L TED TO IR FOURTH ORDER A HARMONICITY TERMS IN THE IN ERIO IC PO ENTIAL. (Author)

Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1961
Accession Number
AD0268850

Entities

People

  • G. Rupprecht
  • R.o. Bell

Organizations

  • RTX

Tags

DTIC Thesaurus Topics

  • Critical Temperature
  • Frequency
  • Glass Transition Temperature
  • Microwaves
  • Phase Transformations
  • Strontium
  • Titanates
  • Transition Temperature
  • Transitions

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Microwave Engineering.
  • Snow Cover Descriptors for Reptiles and Their Illustrations.