Magnetic Ordering in Sr3YCo4O10+x

Transition-metal oxides often exhibit complex magnetic behavior due to the strong interplay between atomic-structure, electronic and magnetic degrees of freedom. Cobaltates, especially, exhibit complex behavior because of cobalt’s ability to adopt various valence and spin state configurations. The c...

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Veröffentlicht in:Scientific reports 2016-01, Vol.6 (1), p.19762-19762, Article 19762
Hauptverfasser: Kishida, Takayoshi, Kapetanakis, Myron D., Yan, Jiaqiang, Sales, Brian C., Pantelides, Sokrates T., Pennycook, Stephen J., Chisholm, Matthew F.
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container_end_page 19762
container_issue 1
container_start_page 19762
container_title Scientific reports
container_volume 6
creator Kishida, Takayoshi
Kapetanakis, Myron D.
Yan, Jiaqiang
Sales, Brian C.
Pantelides, Sokrates T.
Pennycook, Stephen J.
Chisholm, Matthew F.
description Transition-metal oxides often exhibit complex magnetic behavior due to the strong interplay between atomic-structure, electronic and magnetic degrees of freedom. Cobaltates, especially, exhibit complex behavior because of cobalt’s ability to adopt various valence and spin state configurations. The case of the oxygen-deficient perovskite Sr 3 YCo 4 O 10+x (SYCO) has attracted considerable attention because of persisting uncertainties about its structure and the origin of the observed room temperature ferromagnetism. Here we report a combined investigation of SYCO using aberration-corrected scanning transmission electron microscopy and density functional theory calculations. Guided by theoretical results on Co-O distances projected on different planes, the atomic-scale images of several different orientations, especially of the fully oxygenated planes, allow the unambiguous extraction of the underlying structure. The calculated magnetic properties of the new structure are in excellent agreement with the experimental data.
doi_str_mv 10.1038/srep19762
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subjects 639/301/357/997
639/766/119/2793
Cobalt
Electron microscopy
Humanities and Social Sciences
Magnetic properties
MATERIALS SCIENCE
multidisciplinary
Oxides
Science
Temperature effects
Transmission electron microscopy
title Magnetic Ordering in Sr3YCo4O10+x
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