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Spin torque study of the spin Hall conductivity and spin diffusion length in platinum thin films with varying resistivity
Minh-Hai Nguyen, D. C. Ralph, R. A. Buhrman
We report measurements of the spin torque efficiencies in perpendicularly-magnetized Pt/Co bilayers where the Pt resistivity is strongly dependent on thickness .…
Thickness-Dependent Magnetoelasticity and its Effects on Perpendicular Magnetic Anisotropy in Ta|CoFeB|MgO Thin Films
Praveen G. Gowtham, Gregory M. Stiehl, Daniel C. Ralph +1
We report measurements of the in-plane magnetoelastic coupling in ultra-thin Ta|CoFeB|MgO layers as a function of uniaxial strain, conducted using a four-point bending apparatus. F…
A Critical Analysis of the Feasibility of Pure Strain-Actuated Giant Magnetostrictive Nanoscale Memories
Praveen G. Gowtham, Graham E. Rowlands, Robert A. Buhrman
Concepts for memories based on the manipulation of giant magnetostrictive nanomagnets by stress pulses have garnered recent attention due to their potential for ultra-low energy op…
Traveling surface spin-wave resonance spectroscopy using surface acoustic waves
Praveen G. Gowtham, Takahiro Moriyama, Daniel C. Ralph +1
Coherent gigahertz-frequency surface acoustic waves (SAWs) traveling on the surface of a piezoelectric crystal can, via the magnetoelastic interaction, resonantly excite traveling…
GPU-accelerated micromagnetic simulations using cloud computing
C. L. Jermain, G. E. Rowlands, R. A. Buhrman +1
Highly-parallel graphics processing units (GPUs) can improve the speed of micromagnetic simulations significantly as compared to conventional computing using central processing uni…
Enhancement of the Anti-Damping Spin Torque Efficacy of Platinum by Interface Modification
Minh-Hai Nguyen, Chi-Feng Pai, Kayla X. Nguyen +3
We report a strong enhancement of the efficacy of the spin Hall effect (SHE) of Pt for exerting anti-damping spin torque on an adjacent ferromagnetic layer by the insertion of $\ap…