title: Experimental Clocking of Nanomagnets with Strain for Ultralow Power Boolean Logic.
abstract: Nanomagnetic 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.
authors.forename: Noel
authors.initials: N
authors.lastname: D'Souza
authors.affiliation: Department of Physics and Astronomy, University of Delaware , Newark, Delaware 19716, United States.
authors.forename: Mohammad
authors.initials: M
authors.lastname: Salehi Fashami
authors.forename: Supriyo
authors.initials: S
authors.lastname: Bandyopadhyay
authors.forename: Jayasimha
authors.initials: J
authors.lastname: Atulasimha
keywords: Straintronics; energy efficient computing; multiferroic; nanomagnetic computing