Nonreciprocity of edge modes in 1D magnonic crystal

• Magnetostatic surface spin waves in 1D magnonic crystals were studied theoretically.
• Mathematical model is based on plane wave method.
• Mathematical model was applied to different types of magnonic crystals.
• Stop band formation and nonreciprocity were obtained.

Spin waves propagation in 1D magnonic crystals is investigated theoretically. Mathematical model based on plane wave expansion method is applied to different types of magnonic crystals, namely bi-component magnonic crystal with symmetric/asymmetric boundaries and ferromagnetic film with periodically corrugated top surface. It is shown that edge modes in magnonic crystals may exhibit nonreciprocal behaviour at much lower frequencies than in homogeneous films.