L. E. F. Foa Torres

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Elevated seawater pCO2, and in turn ocean acidification (OA), is now widely acknowledged to reduce calcification and growth of reef building corals. As with other environmental factors (e.g., temperature and nutrients), light availability fundamentally regulates calcification and is predicted to change for future reef environments alongside elevated pCO2(More)
Magnetic storage based on racetrack memory is very promising for the design of ultra-dense, low-cost and low-power storage technology. Information can be coded in a magnetic region between two domain walls or, as predicted recently, in topological magnetic objects known as skyrmions. Here, we show the technological advantages and limitations of using Bloch(More)
We study, both experimentally and by numerical modeling, the magnetic dynamics that can be excited in a magnetic thin-film nanopillar device using the spin torque from a spatially localized current injected via a 10s-of-nm-diameter aperture. The current-driven magnetic dynamics can produce large amplitude microwave emission at zero magnetic field, with a(More)
We report on a theoretical study of charge transport properties of graphene nanoribbons under external mechanical stress. The influence of mechanical forces on the ribbon conductance is shown to be strongly dependent on the ribbon edge symmetry, i.e., zigzag versus armchair. In contrast to zigzag-edge nanoribbons which remain robust against high strain(More)
We have employed complete micromagnetic simulations to analyze dc current driven self-oscillations of a vortex core in a spin-valve nanopillar in a perpendicular field by including the coupled effect of the spin-torque and the magnetostatic field computed self-consistently for the entire spin-valve. The vortex in the thicker nanomagnet moves along a(More)
We report micromagnetic simulations of current-driven magnetization reversal of the free-layer nanomagnet in Ir 20 Mn 80 /Ni 80 Fe 20 /Cu/Ni 80 Fe 20 nanoscale spin valves for large current pulses and compare the results to experiments. Our simulations demonstrate that the mechanism of current-driven magnetization reversal in these samples can depend(More)
1 1 Acknowledgments I would first like to thank my advisor, Nancy H. Kolodny, for believing in me. She is responsible for cultivating my curiosity, introducing me to the excitement of scientific inquiry and ultimately, pushing me to believe in myself. Her support, guidance and shared enthusiasm made this project both possible and invaluable over the past 3(More)
the study and wrote the paper; Liang Dong and Tracy Lawson constructed the CO2-stat facility, and (with Lindzai Torres Santa Rosa) produced and analysed the experimental data; Evelyn Lawrenz and David Suggett collated and analysed the metadata set. David Suggett and Liang Dong are joint first authors.
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