Magnonic crystals with complex geometry
作者： Yoshichika Otani , Yoshichika Otani , Anjan Barman , Saswati Barman , Sucheta Mondal
DOI: 10.1103/PHYSREVB.103.064402
关键词: Square lattice 、 Quasiperiodicity 、 Spin wave 、 Physics 、 Ferromagnetism 、 Magnetic field 、 Anisotropy 、 Magnonics 、 Condensed matter physics 、 Quasiperiodic function
摘要: Magnonic crystals offer a wide playground to study the emergent properties of spin waves, and ferromagnetic antidot lattices are leading candidates for magnonic devices due faster propagation waves combined with wide-frequency tunability. Despite having broad range studies on periodic quasiperiodic systems, combination lattice complex basis is absent in literature. The quasiperiodicity octagonal lattice, along triangular lacking reflection symmetry provides newer richer spin-wave dynamics. Such crystal exhibits strong eightfold anisotropy superposed weak threefold anisotropy. This contrast fourfold observed square basis. spatial profiles revealed presence resonant modes both even odd-mode quantization number, besides mode conversion from extended quantized systematic variation in-plane bias magnetic field orientation. These consonance anisotropic behavior modes. modifications asymmetric potential energy landscape these lead stark modulation rich dynamics, thus opening avenues reprogrammable magnonics geometry.
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