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Size-induced enhanced magnetoelectric effect and multiferroicity in chromium oxide nanoclusters
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Size-induced enhanced magnetoelectric effect and multiferroicity in chromium oxide nanoclusters
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Journal Article
Size-induced enhanced magnetoelectric effect and multiferroicity in chromium oxide nanoclusters
2014
Overview
The control of the magnetization of a material with an electric field would make the design and the integration of novel electronic devices possible. This explains the renewed interest in multiferroic materials. Progress in this field is currently hampered by the scarcity of the materials available and the smallness of the magnetoelectric effects. Here we present a proof-of-principle experiment showing that engineering large strains through nanoscale size reduction is an efficient route for increasing magnetoelectric coefficients by orders of magnitude. The archetype magnetoelectric material, Cr
2
O
3
, in the form of epitaxial clusters, exhibits an unprecedented 600% change in magnetization magnitude under 1 V. Furthermore, a multiferroic phase, with both magnetic and electric spontaneous polarizations, is found in the clusters, while absent in the bulk.
Multiferroic materials are of great interest as they might be useful in novel electronic devices, but it is difficult to find materials with large magnetoelectric effects. Here, the authors show that chromium oxide nanoclusters with large strains exhibit a greatly enhanced magnetoelectric coefficient.
Publisher
Nature Publishing Group UK,Nature Publishing Group
Subject
