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