Bias-free spin-wave phase shifter for magnonic logic

TL;DR

This paper proposes a bias-free magnonic phase shifter utilizing a domain wall waveguide in a magnetic dot array, enabling controllable phase shifts and logic operations without external magnetic fields.

Contribution

It introduces a novel bias-free spin-wave phase shifter design based on domain wall waveguides in a dipolar magnetic dot array, demonstrating controllable phase shifts and logic gate implementation.

Findings

Numerical demonstration of controllable phase shift via remagnetization.

Implementation of a logic XOR gate within the same system.

No significant change in mode amplitude during phase control.

Abstract

A design of a magnonic phase shifter operating without an external bias magnetic field is proposed. The phase shifter uses a localized collective spin wave mode propagating along a domain wall "waveguide" in a dipolarly-coupled magnetic dot array existing in a chessboard antiferromagnetic (CAFM) ground state. It is demonstrated numerically that remagnetization of a single magnetic dot adjacent to the domain wall waveguide introduces a controllable phase shift in the propagating spin wave mode without significant change of the mode amplitude. It is also demonstrated that a logic XOR gate can be realized in the same system.