Low Temperature Physics: 43, 1305 (2017); https://doi.org/10.1063/1.5010317
Fizika Nizkikh Temperatur: Volume 43, Number 11 (November 2017), p. 1634-1641    ( to contents , go back )

Magnetic state nature of the weakly anion-excess manganite LaMnO3+δ

V.A. Pashchenko, I.K. Galetich, V.A. Sirenko, V.V. Eremenko, A.V. Eremenko

B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Nauky Ave., Kharkiv 61103, Ukraine
E-mail: vpashchenko@ilt.kharkov.ua

V.V. Brook

Украинский научно-исследовательский институт экологических проблем (УкрНИИЭП) ул. Бакулина, 6, г. Харьков, 61166, Украина
pos Анотація:

Received June 13, 2017

Abstract

The work is devoted to elucidating the nature of magnetic state of the weakly anion-excess lanthanum manganite LaMnO3+δ (δ ≈ 0.0375). The features of the temperature and field dependences of the magnetic moment of a single crystal in the temperature range 2–350 K and in magnetic fields up to 5 T along the c axis are studied in detail. It is restored the field de-pendence of the observed temperature points, such as temperature of magnetic ordering, magnetic glass for-mation, magnetic phase separation. It is found a rela-tionship in the behavior of a number of singular po-ints. The obtained results fully agree with the model representations of magnetic phase separation, which predict a formation of self-trapped states of nanoscale ferromagnetic droplets in a bulk antiferromagnetic matrix.

PACS: 75.50.Ee Antiferromagnetics;
PACS: 74.78.Na Mesoscopic and nanoscale systems;
PACS: 75.10.–b General theory and models of mag-netic ordering;
PACS: 75.25.–j Spin arrangements in magnetically ordered materials;
PACS: 75.30.–m Intrinsic properties of magnetically ordered materials.

Key words: manganites, magnetic properties, phase separation.

Published online: September 25, 2017

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