Berlin 2015 – scientific programme

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MA: Fachverband Magnetismus

MA 48: Magnetization / Demagnetization Dynamics IV

MA 48.7: Talk

Thursday, March 19, 2015, 16:30–16:45, EB 301

Design of a fully functional spin-wave majority gate — •Stefan Klingler, Philipp Pirro, Thomas Brächer, Britta Leven, Burkard Hillebrands, and Andrii V. Chumak — Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany

Magnon-Spintronics aims to replace the electron charge as information carrier by the transport of spin via the fundamental excitations of the magnetization - spin waves and their quanta the magnons - in order to utilize novel methods and effects in the solid state for future information technology. Information can then be stored in the spin-waves’ phase, and thus the data processing occures by the interference of different spin waves.

One important step towards the application of spin-wave devices is the realization of a majority gate, due to its configurability and functionality. It allows to evaluate the majority of an odd number of input signals, and can be used to rebuild multiple logic operations with a single gate like AND-, OR-, NAND- and NOR-operations.

Here, we present the microstructure design and numerical simulations of a fully functional three-input spin-wave majority gate, as well as a spin-wave mode section process, which allows for a single-mode operation therein. For this, we use the material parameters of YIG and spatial dimensions which ensure an easy fabrication. By superimposing the different input waves in the gates, the resulting interference patterns in the output signal will have the same phase, as the majority of the incoming spin waves. With this, the full majority operation is processed and the truth table of the function is reproduced.