  Strain mediated Bennett clocking has only recently been experimentally
demonstrated and suffered from high error rates. Most models used to explain
this behavior are macrospin models. Predictions of these models do not match
experimental designs since they consider all spins rotating coherently and no
magnetoelastic strain feedback. In this paper a fully coupled nonlinear model
(LLG plus elastodynamics) was used to simulate voltage induced Bennett
clocking. This modelling captures the full spin dynamics as well as shape
anisotropy. Two materials were studied (Ni and Terfenol-D) which have very
different exchange lengths. The simulation results show that incoherent
rotation may occur due to the uniaxial nature of the magnetoelastic coupling.
