Dresden 2006 – scientific programme

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MA: Magnetismus

MA 18: Spin-Dynamics, Magnetization Reversal I

MA 18.7: Talk

Tuesday, March 28, 2006, 11:45–12:00, HSZ 403

Spin wave logic gates — •T. Schneider, M. Kostylev, B. Leven, A. Serga, and B. Hillebrands — Fachbereich Physik, TU Kaiserslautern, 67663 Kaiserslautern

We present a new approach for magnetic logic gates either using the phase or the amplitude of the spin-waves. A XNOR gate has been realized using the spin-wave phase as logical “1” and “0”. The necessary phase-shifts can be realized by a weak, locally confined magnetic field, e.g. the field of a current carrying conductor. Using this current controlled phase shifter (CPS), the XNOR gate can be constructed as a Mach-Zehnder interferometer with a CPS in each of the branches. In addition, we have created a NAND gate using the spin-wave amplitude as logical signal. We demonstrate that by applying a magnetic field which is stronger than in the case of the XNOR gate the spin-wave amplitude can be suppressed thus realizing the required input negation. We have constructed prototypes of both logic gates based on yttrium-iron-garnet waveguides and we demonstrate the performance.

This work has been supported by the Deutsche Forschungsgemeinschaft and by the European Community within the EU-project MAGLOG (FP6-510993).