Structure and lattice distortions of orthorhombic crystals with 3d ions / Mozhegorov A. A.,Larin A. V.,Nikiforov A. E. // PHYSICS OF METALS AND METALLOGRAPHY. - 2008. - V. 105, l. 3. - P. 219-227.

ISSN/EISSN:

0031-918X / нет данных

Type:

Article

Abstract:

Formation of the orthorhombic phase of perovskite crystals with 3d elements has been considered and models of the crystal structures of LaMnO3, LaTiO3, YTiO3, LaVO3, and YVO3 have been constructed. A generalization of the results of previous studies has been performed with allowance for the effect of T-2g distortions. An analysis of local symmetrized distortions has shown that the structure of compounds with Ti3+ and V3+ ions is determined by the ``rotational{''} distortions of the T-1g type (Q(x) , Q(y) , Q(z)); the T-2g distortions are only secondary. At the same time, in LaMnO3 of special importance are Jahn-Teller E-g distortions. All the crystals examined exhibit a strong coupling between the lattice and electronic degrees of freedom, which manifests itself in strong vibronic effects. In particular, the terms of the vibronic Hamiltonian that are quadratic in Q(x) , Q(y) , and Q(z) determine the orbital structure of t(2g) compounds.

Author keywords:

TEMPERATURE; TRANSITIONS; SYMMETRY; PHYSICS; OXIDES; LAMNO3

DOI:

10.1134/S0031918X08030022

Web of Science ID:

ISI:000254965500002

Соавторы в МНС:

Другие поля

Поле	Значение
Month	MAR
Publisher	MAIK NAUKA/INTERPERIODICA/SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013-1578 USA
Language	English
Keywords-Plus	TEMPERATURE; TRANSITIONS; SYMMETRY; PHYSICS; OXIDES; LAMNO3
Research-Areas	Metallurgy \& Metallurgical Engineering
Web-of-Science-Categories	Metallurgy \& Metallurgical Engineering
ResearcherID-Numbers	Nikiforov, Anatoliy/L-4436-2016
Number-of-Cited-References	30
Usage-Count-Last-180-days	3
Usage-Count-Since-2013	23
Journal-ISO	Phys. Metals Metallogr.
Doc-Delivery-Number	288DD