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We report nanomagnetic switching with Acoustic Waves (AW) launched frominterdigitated electrodes that modulate the stress anisotropy of ellipticalcobalt nanoscale magnetostrictive magnets (340 nm x 270 nm x 12 nm) delineatedon 128 degree Y-cut lithium niobate. The dipole-coupled nanomagnet pairs are ina single-domain state and are initially magnetized along the major axis of theellipse, with their magnetizations parallel to each other. The magnetizationsof nanomagnets having lower shape anisotropy are reversed upon acoustic wavepropagation. Thereafter, the magnetization of these nanomagnets remains in thereversed state and demonstrate non-volatility. This executes a 'NOT' operation.This proof of acoustic wave induced magnetic state reversal in dipole-couplednanomagnets implementing a 'NOT' gate operation could potentially lead to thedevelopment of extremely energy-efficient nanomagnetic logic. Furthermore,fabrication complexity is reduced immensely due to the absence of individualcontacts to the nanomagnets, leading to lower energy dissipation

applied physics letters

Experimental demonstration of acoustic wave induced magnetization  switching of dipole coupled magnetostrictive nanomagnets for ultralow power  computing