Spin wave waveguides formed by domain walls in arrays of dipolarly coupled magnetic nanodots

Here we propose to use internal domain walls in dot arrays as reconfigurable waveguides acting as passive conduits interconnecting active magnonic elements, e.g. spin-toque nano-oscillators (STNO) generating propagating spin waves. These “building blocks” can be used to design reconfigurable magnonic circuits that include active and passive magnonic elements, generators, mixers, splitters, etc. Unlike conventional spin-wave waveguides [3], the domain walls can be dynamically created and moved across a dot array, opening interesting possibilities of magnonic circuit reconfiguration in real time: interconnecting different elements and rerouting signals by reversing the polarization of selected dots without changing the mechanical configuration of the circuit.