Accession Number : AD0749676
Title : A Temperature Study of the EPR Spectra of CaF2:ER3+.
Descriptive Note : Research rept.,
Corporate Author : NAVAL ACADEMY ANNAPOLIS MD
Personal Author(s) : Seeley,James R.
Report Date : 19 MAY 1972
Pagination or Media Count : 106
Abstract : A temperature study was made of the EPR spectra of trivalent erbium in a crystal of calcium fluoride. The main objective of the study was to resolve a controversy in the literature concerning the nature of a particular tetragonal site in CaF2 :Er(3+). A tetragonal site and a strong tetragonal site were identified with splitting values. The EPR patterns were identified by a study of the Zeeman patterns of the lines as a functions of rotation about the (110) axis of the crystal. The EPR spectra were taken in 5 degree increments in azimuthal angle and provided a plot which could be used to establish the site symmetries by purely geometric means. (Author)
Descriptors : (*ERBIUM, PARAMAGNETIC RESONANCE), DOPING, CALCIUM FLUORIDES, CRYSTAL STRUCTURE, ZEEMAN EFFECT, EXPERIMENTAL DESIGN, CRYOGENICS
Subject Categories : Solid State Physics
Distribution Statement : APPROVED FOR PUBLIC RELEASE