From spin-polarized interfaces to giant magnetoresistance in organic spin valves

We calculate the spin-polarized electronic transport through a molecular bilayer spin valve from first principles, and establish the link between the magnetoresistance and the spin-dependent inter- actions at the metal-molecule interfaces. The magnetoresistance of a Fe|bilayer-C70|Fe spin valve attains a high value of 70% in the linear response regime, but it drops sharply as a function of the applied bias. The current polarization has a value of 80% in linear response, and also decreases as a function of bias. Both these trends can be modelled in terms of prominent spin-dependent Fe|C70 interface states close to the Fermi level, unfolding the potential of spinterface science to control and optimize spin currents.Comment: 13 pages, 5 figure

Hábitos alimentarios de las familias que pertenecen al programa de complementación alimentaria, desayunos infantiles Maná con amor.

El departamento de Antioquia presenta una grave problemática de seguridad alimentaria con las más altas tasas de mortalidad infantil por desnutrición. El objetivo de esta investigación es identificar los hábitos alimentarios de la población del Bajo Cauca que pertenecen al programa MANÁ Infantil C