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Published in: Physics of Metals and Metallography 14/2023

05-02-2024 | ELECTRICAL AND MAGNETIC PROPERTIES

A-Site Order-Disorder Evolution in Double Manganites RBaMn2O6 (R = Pr, Nd)

Authors: E. V. Mostovshchikova, E. V. Sterkhov, S. V. Pryanichnikov, L. B. Vedmid’, S. G. Titova

Published in: Physics of Metals and Metallography | Issue 14/2023

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Abstract

Structural, magnetic and optical properties of double manganites PrBaMn2O6 and NdBaMn2O6 are studied depending on the degree of ordering in the A-position. It is shown that, annealing induced disordering goes in an initial stage throw formation of a two-phase state: a phase with a high A-site ordering with TC ∼ 280–300 K and a phase with a low ordering of ~30% with significantly lower TC coexist. In partially ordered PrBaMn2O6 samples there are metal-insulator transitions near TC of the each coexisting phases. In partially ordered NdBaMn2O6 in a highly A-site ordered high-temperature phase, there is no metal-insulator transition due to the destruction of the channels for metallic conductivity formed by the ordering of the x2y2 orbitals. If a metal-insulator transition takes place, the application of a magnetic field leads to the effect of magnetotransmission near TC, which is associated with a change in the concentration of delocalized charge carriers.

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Metadata
Title
A-Site Order-Disorder Evolution in Double Manganites RBaMn2O6 (R = Pr, Nd)
Authors
E. V. Mostovshchikova
E. V. Sterkhov
S. V. Pryanichnikov
L. B. Vedmid’
S. G. Titova
Publication date
05-02-2024
Publisher
Pleiades Publishing
Published in
Physics of Metals and Metallography / Issue 14/2023
Print ISSN: 0031-918X
Electronic ISSN: 1555-6190
DOI
https://doi.org/10.1134/S0031918X23602421

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