The Kinetics of Ion Motion in CaF2 :Er.
Abstract
Optical density versus wavelength was measured for CaF2 :Er(3+) crystals as a function of the temperature to which the crystals were heated prior to quenching. The quenching of the crystals had the effect of freezing in the high temperature equilibrium defect configurations in the crystal. The results obtained support assignments of the optical absorption lines to various defect configurations. It was observed that the absorption line at 537.43 nm increased in height by a factor of about 20 as a result of heating and quenching, supporting the assumption that it is the result of a monomer defect site. The behavior of the absorption lines at 537.06 nm and 537.92 nm support the models that these lines are due to low order clusters. The equilibrium among the defects of the CaF2 :Er crystals can be described by an Arrhenius process characterized by an activation energy of 1.26 + or - 0.02 eV. The equilibrium, characteristic of the temperature from which the crystal was quenched, has been modeled to be established by mobile interstitial fluorines.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 08, 1979
- Accession Number
- ADA077555
Entities
People
- David Alan Beam
Organizations
- United States Naval Academy