ELECTRON PARAMAGNETIC RESONANCE OF TRIVALENT GADOLINIUM IONS IN STRONTIUM AND BARIUM TITANATES

Abstract

Electron paramagnetic resonance data of substitutional Gd(+3) impurities in the cubic and tetragonal phases of barium and strontium titanates are reported. The pertinent spin Hamiltonian parameters are determined as a function of temperature re in these two phases of both crystals. The temperature for the cubic to tetragonal phase transition in SrTiO3 was determined to be (110 ! 2.5 K). This result was checked by the observation of the temperature dependence of the birefringence pattern of pure (undoped) crystals. In the SrTiO3 crystal a smooth transition was observed, contrary to the case in BaTiO3. The Gd(+3) resonance results are compared with previous data on EPR of iron group impurities.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1962
Accession Number
AD0273981

Entities

People

  • G.a. Demars
  • L. Rimai

Organizations

  • RTX

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms

DTIC Thesaurus Topics

  • Air Force
  • Barium Titanates
  • Crystal Lattice Vibrations
  • Crystal Lattices
  • Distortion
  • Electron Paramagnetic Resonance
  • Elements
  • Frequency
  • Government Procurement
  • Governments
  • Ground State
  • Magnetic Fields
  • Paramagnetic Resonance
  • Phase Transformations
  • Resonance
  • Spin-Orbit Interaction
  • Transition Temperature

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Surface Engineering/Surface Coating Technology.

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene