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Giant magneto–electric coupling in 100 nm thick Co capped by ZnO nanorods

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Abstract

Here we report a giant, completely reversible magneto–electric coupling of 100 nm polycrystalline Co layer in contact with ZnO nanorods. When the sample is under an applied bias of ±2 V, the Co magnetic coercivity is reduced by a factor 5 from the un-poled case, with additionally a reduction of total magnetic moment in Co. Taking into account the chemical properties of ZnO nanorods measured by X-rays absorption near edge spectroscopy under bias, we conclude that these macroscopic effects on the magnetic response of the Co layer are due to the microstructure and the strong strain-driven magneto–electric coupling induced by the ZnO nanorods, whose nanostructuration maximizes the piezoelectric response under bias.

Graphical abstract: Giant magneto–electric coupling in 100 nm thick Co capped by ZnO nanorods

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Publication details

The article was received on 12 Dec 2017, accepted on 14 Dec 2017 and first published on 19 Dec 2017


Article type: Paper
DOI: 10.1039/C7NR09233D
Citation: Nanoscale, 2018, Advance Article
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    Giant magneto–electric coupling in 100 nm thick Co capped by ZnO nanorods

    G. Vinai, B. Ressel, P. Torelli, F. Loi, B. Gobaut, R. Ciancio, B. Casarin, A. Caretta, L. Capasso, F. Parmigiani, F. Cugini, M. Solzi, M. Malvestuto and R. Ciprian, Nanoscale, 2018, Advance Article , DOI: 10.1039/C7NR09233D

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