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Gigantic effect of iron doping upon magnetism in the «114» magnetoelectric CaBaCo4O7

Abstract : The investigation of the CaBaCo4-xFex07 oxide shows that a huge decrease of ferrimagnetism is produced for very low Fe contents (x andlt; 0.05) at the benefit of magnetic phase separation and magnetic frustration. This gigantic effect of iron doping at the Co3+ sites in CaBaCo4O7 is compared to that produced by diamagnetic Ga3+ and Al3+ dopants, showing that the antiferromagnetic interactions between the dopant Fe3+ and the Co2+ ferromagnetic chains has a crucial role in the destabilization of the ferrimagnetic structure, whereas the triangular geometry of the cobalt sublattice imposes the appearance of magnetic frustration. © 2015 Elsevier B.V. All rights reserved.
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https://hal-normandie-univ.archives-ouvertes.fr/hal-02184783
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Submitted on : Tuesday, July 16, 2019 - 11:33:49 AM
Last modification on : Wednesday, July 17, 2019 - 1:37:30 AM

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M.M. Seikh, A.K. Kundu, V. Caignaert, B. Raveau. Gigantic effect of iron doping upon magnetism in the «114» magnetoelectric CaBaCo4O7. Journal of Alloys and Compounds, 2016, 656, pp.166-171. ⟨10.1016/j.jallcom.2015.08.257⟩. ⟨hal-02184783⟩

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