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

Nanoscale
Giovanni VinaiRoberta Ciprian

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.

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Citations

Aug 11, 2018·Nanoscale·Daniela M CorreiaSenentxu Lanceros-Méndez
Nov 24, 2018·Nanoscale·Vitaly NeshchimenkoJinpeng Lv
Nov 8, 2018·The Review of Scientific Instruments·R CiprianM Malvestuto
Sep 2, 2021·ACS Nano·Anna DmitriyevaAndrei Zenkevich

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Methods Mentioned

BETA
X-ray
scanning electron microscopy
circular dichroism

Software Mentioned

XANES
MOKE

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