Ligand electron-nuclear double resonance of T-1 trigonal Gd3+ centers in CaF2 with a mixed oxygen-fluorine environment / Gorlov AD // PHYSICS OF THE SOLID STATE. - 2004. - V. 46, l. 11. - P. 2030-2034.

ISSN/EISSN:

1063-7834 / нет данных

Type:

Article

Abstract:

This paper reports on the results of ligand electron-nuclear double resonance (ENDOR) investigations of T-1 trigonal Gd-157(3+) centers in the CaF2 compound. It is experimentally found that the nearest environment of an impurity center contains only one F-19 ion. Anions in the other coordination shells are identical to those in the pure CaF2 crystal. However, F-19 ions in these shells are displaced from their ideal positions in the lattice. The parameters of the ligand hyperfine interaction (LHFI) for F-19 nuclei and their coordinates and displacements with respect to the positions in the lattice of the pure CaF2 crystal are determined. It is demonstrated that the unusual isotropic LHFI constant A(s) > 0 for Gd3+ ions in the lattice with a mixed oxygen-fluorine nearest environment can be associated with the strong polarization of impurity centers in accordance with the empirical model proposed in {[}1], provided the structural model of the nearest environment of impurities in the T-1 centers {[}2] is correct. This structural model is confirmed by the analysis of the isotropic hyperfine constant A(s) for Gd-157(3+) centers. (C) 2004 MAIK ``Nauka/Interperiodica{''}.

Author keywords:

HYPERFINE INTERACTION; CRYSTALS; ENDOR; ION

DOI:

10.1134/1.1825545

Web of Science ID:

ISI:000225042800010

Соавторы в МНС:

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Другие поля

Поле	Значение
Publisher	AMER INST PHYSICS
Address	CIRCULATION \& FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA
Language	English
Keywords-Plus	HYPERFINE INTERACTION; CRYSTALS; ENDOR; ION
Research-Areas	Physics
Web-of-Science-Categories	Physics, Condensed Matter
Author-Email	Anatoliy.Gorlov@usu.ru
Number-of-Cited-References	16
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	3
Journal-ISO	Phys. Solid State
Doc-Delivery-Number	870FK