Ferromagnetic interactions in Mn3+ based perovskites

La0.7Sr0.3Mn3+0.85Sb5+0.15O3 and La0.7Sr0.3Mn3+0.8Sb5+0.1Ge4+0.1O3 compounds with dominantly isovalent Mn3+ ions were studied by neutron powder diffraction and magnetization measurements. The compounds are basically ferromagnetic, with magnetic moments slightly above of 3 μB/Mn. Upon temperature dec...

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Bibliographic Details
Published in:Journal of physics. Condensed matter 2014-10, Vol.26 (39), p.396002-396002
Main Authors: Troyanchuk, I O, Karpinsky, D, Efimov, V, Sikolenko, V, Prokhnenko, O, Bartkowiak, M
Format: Article
Language:English
Subjects:
crystal structure
magnetic interactions
perovskites
Online Access:Get full text
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Summary:La0.7Sr0.3Mn3+0.85Sb5+0.15O3 and La0.7Sr0.3Mn3+0.8Sb5+0.1Ge4+0.1O3 compounds with dominantly isovalent Mn3+ ions were studied by neutron powder diffraction and magnetization measurements. The compounds are basically ferromagnetic, with magnetic moments slightly above of 3 μB/Mn. Upon temperature decrease, the compounds exhibit structural transition from a rhombohedral phase to orbitally disordered orthorhombic one. The structural transitions occur well above the temperature of magnetic ordering (Tc 130 K). It is suggested that the ferromagnetic state is governed by the positive part of superexchange interactions Mn3+‒O‒Mn3+, which is enhanced by Mn(eg)‒O(2p) hybridization.
ISSN:0953-8984
1361-648X
DOI:10.1088/0953-8984/26/39/396002