GD3+ CRYSTAL-FIELD EFFECTS IN LOW-SYMMETRICAL CENTERS / LEVIN LI,GORLOV AD // JOURNAL OF PHYSICS-CONDENSED MATTER. - 1992. - V. 4, l. 8. - P. 1981-1992.

ISSN/EISSN:

0953-8984 / нет данных

Type:

Article

Abstract:

A correlation between collections of the experimental values of the crystal-field parameters \{P-2(0), b2(0), A2(0)\} characterizing the nuclear quadrupole interaction, the ground-state and excited-state splitting for Gd-157(3+) in various ionic crystals with the same type of anions has been established. The correlation consists of a tendency towards a decrease in P-2(0) and an increase in A2(0) through a series of these collections provided that they are arranged according to descending values of b2(0). The great variety of the centres involved and the considerable magnitudes of the intervals within which the parameters of the collections obeying the correlation fall suggest that this correlation is a highly general characteristic of the collections \{P-2(0), b2(0), A2(0)\} and its explanation may be regarded as an important criterion of validity for microtheory crystal-field models. We have developed a model to interpret the correlation mentioned and some cases of deviation from it. The phenomenological values of the Sternheimer antiscreening coefficient gamma(infinity) have been determined in different ways. These values agree with each other and with the value of gamma(infinity) for Pr3+ calculated by Ahmad and Newman taking the interelectron correlation into account in addition to the interactions considered by Sternheimer originally.

Author keywords:

ELECTRON-PARAMAGNETIC-RES; OPTICAL-ABSORPTION; SPECTRA; IONS; SPLITTINGS; PARAMETERS; HYPERFINE; LINBO3; GD-3+; LIYF4

DOI:

10.1088/0953-8984/4/8/013

Web of Science ID:

ISI:A1992HF56100013

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	FEB 24
Publisher	IOP PUBLISHING LTD
Address	TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX
Language	English
Keywords-Plus	ELECTRON-PARAMAGNETIC-RES; OPTICAL-ABSORPTION; SPECTRA; IONS; SPLITTINGS; PARAMETERS; HYPERFINE; LINBO3; GD-3+; LIYF4
Research-Areas	Physics
Web-of-Science-Categories	Physics, Condensed Matter
Number-of-Cited-References	52
Usage-Count-Since-2013	2
Journal-ISO	J. Phys.-Condes. Matter
Doc-Delivery-Number	HF561