Article,

Impact of Co-doping on the structural and magnetic properties of multiferroic CaMn7O12

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JOURNAL OF ALLOYS AND COMPOUNDS, (2018)
DOI: 10.1016/j.jallcom.2017.11.260

Abstract

In this manuscript we showed that Co-doping into CaMn7O12 (CMO) induces charge disordering between Mn3+ and Mn4+ ions into the B site in the perovskite structure leading to a cubic structure Im (3) over bar. Both antiferromagnetic transitions at T-N1 and T-N2 previously observed in CMO are strongly influenced by Co-doping. The transition at T-N1 disappears due to the structural disorder due to the Co doping, while that one at T-N2 occurs at high temperatures. Our magnetic results explained the role of Co-doping on the magnetic ordering of CMO. Since this magnetic ordering drives the induced electric polarization in such compound, the Co doping comes up as a simple way to tune the coupling between electric polarization and magnetic helix in CMO. (C) 2017 Elsevier B.V. All rights reserved.

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