Crystal Field Study of Gd(3+)-Doped La(x)RE(1-x)F3 (RE=Ce,Pr,Nd) Single Crystals
Abstract
The mixed La(x)RE(1-x)F3 (RE = Ce, Pr, Nd) single crystals doped with Gd(3+) (0.1 mol%) were grown by a modified Bridgmann-Stockbarger method. The crystal field was investigated using electron paramagnetic resonance technique. The angular dependencies of Gd(3+) (sup 8 S sub 7/2, f sup 7) line positions with magnetic field oriented in (001) plane were measured in the temperature range 4.2 - 295 K. The surroundings of Gd(3+) ions were investigated analyzing spin-hamiltonian parameters in the light of the superposition model. The small distortion of the (D sup 4 sub 3d) trigonal symmetry has been observed in LaF3, La(0.9)Ce(0.1)F3 and La(0.9)Nd(0.1)F3 below 150 K. The local structure deformation of the site symmetry of Gd(3+) ions induced by temperature starts at about 150 K becoming larger at 4.2 K. In PrF3 the distortion was not observed in the temperature range 4.2 - 295 K. The results were compared with those of Gd(3+)-doped LiYF4 crystals.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 2001
- Accession Number
- ADP011905
Entities
People
- Lucjan E. Misiak
- Mieczyslaw L. Paradowski
- Wieslawa Korczak
- Zbigniew Korczak