Effect of hydrostatic and chemical pressure on BaF2 and BaF2 : Eu2+ crystals / Nikiforov AE,Zakharov AY,Chernyshev VA,Ugryumov MY,Kotomanov SV // PHYSICS OF THE SOLID STATE. - 2002. - V. 44, l. 10. - P. 1949-1953.

ISSN/EISSN:

1063-7834 / 1090-6460

Type:

Article

Abstract:

The effect of hydrostatic pressure on a BaF2 crystal was studied within the shell model in the pairwise potential approximation. The structural phase transition from the cubic to orthorhombic phase was simulated. The behavior of the unit-cell parameters of the alpha- and beta-BaF2 phases under hydrostatic pressure (from 0 to 12 GPa) was investigated. The fundamental vibration frequencies of BaF2 under hydrostatic pressure (0-3.5 GPa) were calculated for both phases. The effect of chemical pressure on the BaF2 crystal was studied by simulating Ba1 - xMexF2 mixed crystals (Me = Ca, Sr). It was shown that at impurity concentrations up to 15-20 at. \% the lattice constant varies in the same way as it does when hydrostatic pressure increases to P-c, which corresponds to a phase transition to the orthorhombic phase. The effect of chemical and hydrostatic pressure on BaF2 : Eu2+ doped crystals was also studied. The dependence of the absorption and luminescence zero-phonon line shift on the Eu2+-ligand distance was calculated. (C) 2002 MAIK ``Nauka/Interperiodica{''}.

Author keywords:

X-RAY; FLUORITE; IONS; LUMINESCENCE; DISTORTIONS

DOI:

10.1134/1.1514786

Web of Science ID:

ISI:000178374400020

Соавторы в МНС:

Другие поля

Поле	Значение
Publisher	MAIK NAUKA/INTERPERIODICA/SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013-1578 USA
Language	English
EISSN	1090-6460
Keywords-Plus	X-RAY; FLUORITE; IONS; LUMINESCENCE; DISTORTIONS
Research-Areas	Physics
Web-of-Science-Categories	Physics, Condensed Matter
ResearcherID-Numbers	Nikiforov, Anatoliy/L-4436-2016
Number-of-Cited-References	22
Usage-Count-Since-2013	3
Journal-ISO	Phys. Solid State
Doc-Delivery-Number	600DB