Magnetoelectric Control of Superparamagnetism
Nano Letters2013Vol. 13(3), pp. 884–888
Citations Over TimeTop 10% of 2013 papers
Hyungsuk K. D. Kim, Laura T. Schelhas, Scott Keller, Joshua L. Hockel, Sarah H. Tolbert, Gregory P. Carman
Abstract
Here we demonstrate electric-field induced magnetic anisotropy in a multiferroic composite containing nickel nanocrystals strain coupled to a piezoelectric substrate. This system can be switched between a superparamagnetic state and a single-domain ferromagnetic state at room temperature. The nanocrystals show a shift in the blocking temperature of 40 K upon electric poling. We believe this is the first example of a system where an electric field can be used to switch on and off a permanent magnetic moment.
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