nl5b04205_si_001.pdf (4.23 MB)
Experimental Clocking of Nanomagnets with Strain for Ultralow Power Boolean Logic
journal contribution
posted on 2016-02-04, 16:35 authored by Noel D’Souza, Mohammad Salehi Fashami, Supriyo Bandyopadhyay, Jayasimha AtulasimhaNanomagnetic
implementations of Boolean logic have attracted attention because
of their nonvolatility and the potential for unprecedented overall
energy-efficiency. Unfortunately, the large dissipative losses that
occur when nanomagnets are switched with a magnetic field or spin-transfer-torque
severely compromise the energy-efficiency. Recently, there have been
experimental reports of utilizing the Spin Hall effect for switching
magnets, and theoretical proposals for strain induced switching of
single-domain magnetostrictive nanomagnets, that might reduce the
dissipative losses significantly. Here, we experimentally demonstrate,
for the first time that strain-induced switching of single-domain
magnetostrictive nanomagnets of lateral dimensions ∼200 nm
fabricated on a piezoelectric substrate can implement a nanomagnetic
Boolean NOT gate and steer bit information unidirectionally in dipole-coupled
nanomagnet chains. On the basis of the experimental results with bulk
PMN–PT substrates, we estimate that the energy dissipation
for logic operations in a reasonably scaled system using thin films
will be a mere ∼1 aJ/bit.