Field-controlled ultrafast magnetization dynamics in two-dimensional nanoscale ferromagnetic antidot arrays

• DOI: 10.3762/bjnano.9.104
• Publication Date: 2018-04-09T09:37:01Z
• Authors: Anulekha De; Sucheta Mondal; Sourav Sahoo; Saswati Barman; Yoshichika Otani; Rajib Kumar Mitra; Anjan Barman
• Keywords: Magnetization dynamics; Spin wave

Ferromagnetic antidot arrays have emerged as a system of tremendous interest due to their interesting spin configuration and dynamics well potential applications in magnetic storage, memory, logic, communications sensing devices. Here, we report experimental numerical investigation ultrafast magnetization new type lattice the form triangular-shaped Ni 80 Fe 20 antidots arranged hexagonal array. Time-resolved magneto-optical Kerr effect micromagnetic simulations been exploited study precession spin-wave modes with varying constant in-plane orientation bias-magnetic field. A remarkable variation bias field is found be associated conversion extended quantized ones vice versa. The also influences this spectra mode profiles. These observations are important for lattices triangular holes future magnonic spintronic