Spin-texture driven reconfigurable magnonics in chains of connected<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi mathvariant="normal">Ni</mml:mi><mml:mn>80</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">Fe</mml:mi><mml:mn>20</mml:mn></mml:msub></mml:mrow></mml:math>submicron dots
Amrit Kumar Mondal, Chandrima Banerjee, Arundhati Adhikari, Avinash Kumar Chaurasiya, Samiran Choudhury, Jaivardhan Sinha, Saswati Barman, Anjan Barman
Abstract
Topological magnonics has attracted intense interest for application in energy efficient computational devices. Here, we show reconfigurable magnonic band structure and band gap by a bias-field controlled spin texture in chains of connected ${\mathrm{Ni}}_{80}{\mathrm{Fe}}_{20}$ submicron dots. Particularly for an identical field value, we achieve both ``$S$'' and shifted-core vortex states based on magnetic history leading to a drastic change in magnonic band structure. A first-order phase transition from the saturation to vortex state drives this change, as opposed to a continuous change from the saturation to $S$ state.