Spin-phonon and lattice contributions to the ground-state splitting of Gd3+ and Eu2+ in scheelite crystals / Gorlov A. D. // PHYSICS OF THE SOLID STATE. - 2015. - V. 57, l. 7. - P. 1394-1398.

ISSN/EISSN:

1063-7834 / 1090-6460

Type:

Article

Abstract:

The EPR spectra of Gd3+ in CaWO4 single crystals have been studied at temperatures T = 1.8, 4.2, and 114-300 K, and the temperature dependence of the parameters b (n) (m) (T) of the spin Hamiltonian has been found. The behavior of b (2) (0) (T) has been analyzed. The spin-phonon and static lattice contributions b (2) (0) (F) and b (2) (0) (L) to b (2) (0) (T) have been revealed. For this purpose, the variation of b (2) (0) (L) has been calculated taking into account the thermal shifts of oxygen ions in CaWO4. Similar analysis has been carried out for CaWO4: Eu2+ based on the EPR data of other authors (Bronstein, Voterra and Harvey, Kiefte). It has been shown that at b (2) (0) (F) > 0, the variation of b (2) (0) (F) as a function of T for these impurity centers is described well by the Pfister model and a sign change of b (2) (0) (T) for Eu2+ is determined by thermal expansion of the lattice.

Author keywords:

ELECTRON-PARAMAGNETIC-RESONANCE; TEMPERATURE-DEPENDENCE; HAMILTONIAN PARAMETERS; HYPERFINE-STRUCTURE; FIELD SPLITTINGS; SINGLE-CRYSTALS; EPR-SPECTRA; IONS

DOI:

10.1134/S1063783415070124

Web of Science ID:

ISI:000357510700022

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	JUL
Publisher	MAIK NAUKA/INTERPERIODICA/SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013-1578 USA
Language	English
EISSN	1090-6460
Keywords-Plus	ELECTRON-PARAMAGNETIC-RESONANCE; TEMPERATURE-DEPENDENCE; HAMILTONIAN PARAMETERS; HYPERFINE-STRUCTURE; FIELD SPLITTINGS; SINGLE-CRYSTALS; EPR-SPECTRA; IONS
Research-Areas	Physics
Web-of-Science-Categories	Physics, Condensed Matter
Author-Email	Anatoliy.Gorlov@urfu.ru
Funding-Acknowledgement	Ministry of Education and Science of the Russian Federation {[}2457]
Funding-Text	This study was supported by the Ministry of Education and Science of the Russian Federation (state order no. 2457) and performed on the equipment of the Joint Use Center ``Modern Nanotechnologies{''} (Ural Federal University, Yekaterinburg, Russia).
Number-of-Cited-References	25
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	8
Journal-ISO	Phys. Solid State
Doc-Delivery-Number	CM2LE