Electrostatic Tuning of the Proximity-Induced Exchange Field in EuS/Al Bilayers
ORAL
Abstract
We demonstrate that the proximity-induced exchange field, $H_{ex}$ in ferromagnetic/paramagnetic bilayers can be modulated with an electric field. An electrostatic gate arrangement is used to tune the magnitude of $H_{ex}$ in the Al component of EuS/Al bilayers. We produced modulations of $\sim30$ Oe in $H_{ex}$ with the application of perpendicular electric fields of the order of $\pm 10^6$ V/cm. Several possible mechanisms accounting for the electric field's influence on the interfacial coupling between the Al layer and the ferromagnetic insulator EuS will be discussed.
*Authors gratefully acknowledge support from the U.S. DOE.
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