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Fizika Tverdogo Tela, 2016, Volume 58, Issue 6, Pages 1080–1085 (Mi ftt9946)  

Magnetism

Nonuniform paramagnetic state in nonstoichiometric lanthanum manganites La$_{1-x}$Mn$_{1-y}$O$_{3}$

T. I. Arbuzova, S. V. Naumov

Institute of Metal Physics, Ural Division of the Russian Academy of Sciences, Ekaterinburg
Abstract: The magnetic properties of nonstoichiometric lanthanum manganites La$_{1-x}$Mn$_{1-y}$O$_{3}$ have been studied in the temperature range 80 K $<T<$ 650 K. The Curie temperature $T_C$ changes nonmonotonically as the number of Mn$^{4+}$ ions increases. In the paramagnetic region, there exist isolated Mn ions and magnetic polarons which can be conserved to $T\le$ 4$T_{C}$, independent of the lattice symmetry. In the $T_{C}<T<T_{\operatorname{pol}}$ region, the temperature dependences of the magnetic susceptibility are nonlinear and can be described by the Curie law with a temperature-dependent Curie constant $C$. The sample has been prepared having a composition near the O' $\to$ O structural transition; the spontaneous magnetization of the sample at $T\le$ 1.6$T_{C}$ is associated to correlated polarons forming due to the double exchange in chains of the $E$-type antiferromagnetic phase.
Received: 28.10.2015
English version:
Physics of the Solid State, 2016, Volume 58, Issue 6, Pages 1115–1120
DOI: https://doi.org/10.1134/S1063783416060044
Bibliographic databases:
Document Type: Article
Language: Russian
Citation: T. I. Arbuzova, S. V. Naumov, “Nonuniform paramagnetic state in nonstoichiometric lanthanum manganites La$_{1-x}$Mn$_{1-y}$O$_{3}$”, Fizika Tverdogo Tela, 58:6 (2016), 1080–1085; Phys. Solid State, 58:6 (2016), 1115–1120
Citation in format AMSBIB
\Bibitem{ArbNau16}
\by T.~I.~Arbuzova, S.~V.~Naumov
\paper Nonuniform paramagnetic state in nonstoichiometric lanthanum manganites La$_{1-x}$Mn$_{1-y}$O$_{3}$
\jour Fizika Tverdogo Tela
\yr 2016
\vol 58
\issue 6
\pages 1080--1085
\mathnet{http://mi.mathnet.ru/ftt9946}
\elib{https://elibrary.ru/item.asp?id=27368640}
\transl
\jour Phys. Solid State
\yr 2016
\vol 58
\issue 6
\pages 1115--1120
\crossref{https://doi.org/10.1134/S1063783416060044}
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