Dresden 2014 – scientific programme

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O: Fachverband Oberflächenphysik

O 90: Post-Deadline Session

O 90.3: Talk

Thursday, April 3, 2014, 20:30–20:45, TRE Phy

Spintronic battery that stores enegy magnetically — •Elena Vedmedenko and David Altwein — University of Hamburg, Germany

The novel generation of computers is supposed to be based on logical elements made of chains of magnetic atoms or nanomagnets. Any computer generation and logical elements require energy supply, but uses the energy not all the time. A key issue for technology's competitiveness is to figure out how to store energy when it isn't used. Here, we discover that it can be stored in magnetic helices with integer number of revolutions. Based on simulations and a benchmarked prototype, this finding permited to propose an energy storing element that uses spins only. To store energy one has to rotate one of the end-nanomagnets in a chain until the helix will click into place. At the later time the magnet may be released to deliver the energy on demand. The longer is a chain, the larger amount of rotations can be stored. The stable magnetic helices can be also used to transfer the information. To do so, one has to read out when a knot, created at one end of the chain will arrive at the other chain's end. The main advantage of the proposed concept is it's scalability from the macro- to the atomic scale and applicability to the great diversity of systems like e.g. magnetic multilayers, magnetic or molecular nanoarrays, colloids, Bose-Einstein condensates, and atomic ensembles.