Friday, December 17, 2010
Electric current moves magnetic vortices (w/ Video): "In the next step, Christian Pfleiderer and his team made further measurements at the MIRA instrument of the neutron source FRM II in an attempt to determine why the lattice twisted when a current was applied. At first, the calculations of the theoreticians contradicted the results of the experiments in Garching. 'The magnetic structure twists, because the direction of the electric current is deflected extremely efficiently by quantum mechanical effects,' explains Christian Pfleiderer. When an electron flies through the magnetic vortex, the electron's spin reacts to the vortex (see animation). In this way the electric current exerts a force on the magnetic vortices, which eventually begin to flow."