The recent development of spin dynamics opens perspectives for various applications
based on spin waves, including logic devices. The first important step in the
realization of spin-wave-based logics is the manipulation of spin-wave interference.
Here, we present the experimental realization of a micrometre-scale spin-wave
interferometer consisting of two parallel spin-wave waveguides. The spin waves
propagate through the waveguides and the superposition or interference of the
electrical signals corresponding to the spin waves is measured. A direct current
flowing through a metal wire underneath one of the spin-wave waveguides affects the
propagation properties of the corresponding spin wave. The signal of constructive or
destructive interference depends on the magnitude and direction of the applied
direct current. Thus, the present work demonstrates a unique manipulation of
spin-wave interference.
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