Low-Voltage Control of (Co/Pt) <sub>x</sub> Perpendicular Magnetic Anisotropy Heterostructure for Flexible Spintronics.
basic_science · Level V
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- Record sourced from PubMed, PMID 29870657.
- Also identified by DOI 10.1021/acsnano.8b03097.
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Abstract
The trend of mobile Internet requires portable and wearable devices as bio-device interfaces. Electric field control of magnetism is a promising approach to achieve compact, light-weight, and energy-efficient wearable devices. Within a flexible sandwich heterostructure, perpendicular magnetic anisotropy switching was achieved via low-voltage gating control of an ionic gel in mica/Ta/(Pt/Co) <sub>x</sub>/Pt/ionic gel/Pt, where (Pt/Co) <sub>x</sub> acted as a functional layer. By conducting in situ VSM, EPR, and MOKE measurements, a 1098 Oe magnetic anisotropy field change was determined at the bending state with tensile strain, corresponding to a magnetic anisotropy energy change of 3.16 × 10<sup>5</sup> J/m<sup>3</sup> and a giant voltage tunability coefficient of 0.79 × 10<sup>5</sup> J/m<sup>3</sup>·V. The low voltage and strain dual control of magnetism on mica substrates enables tunable flexible spintronic devices with an increased degree of manipulation.