Investigation of Pyroelectric and Pyromagnetic Detection.

Abstract

A full discussion is given of Mr. V. Singh's capacitive bolometer work. Capacitive bolometer detectors using TGS, and operating in the paraelectric region close to the Curie point, are shown to be comparable in performance for infrared detection with the best thermal detectors. An excess polarization noise was observed that adversely influences the NER. Most of the theoretical work deals with the molecular field model. This model gives the right order of magnitude of p/sq root of e, which is the figure of merit of the pyroelectric detector; a more refined calculation for TGS gives agreement between theory and experiment within 10%. The three level model, if realized experimentally, might give better performance near the Curie temperature. The other hope for improvement of pyroelectric detectors lies in decreasing tan delta. Procedures for making contacts and synthesizing ceramic samples are outlined. Au-Cr contacts give reproducible and reliable performance.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1974
Accession Number
ADA112855

Entities

People

  • A. Van Der Ziel

Organizations

  • University of Minnesota

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Chemistry
  • Crystal Structure
  • Curie Temperature
  • Detection
  • Detectors
  • Diagrams
  • Dielectric Permittivity
  • Dipole Moments
  • Dissipation Factor
  • Electrical Engineering
  • Engineering
  • Equations
  • Figure Of Merit
  • Frequency
  • Materials
  • Measurement
  • Specific Heat

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Theoretical Analysis.
  • Thermal Physics or Thermal Science.