Ferromagnetic films with magnon bandgap periodic structures: Magnon crystals

Spatial confinement of ferromagnetic resonances in honeycomb antidot lattices

“…High-quality antidot lattice can be a 2D magnonic crystal [1][2][3][4][5], the basis for magnetic metamaterials [4], and offers new ways for the development of the data processing without moving electrical charges with working frequencies in the gigahertz regime [6,7]. Fundamentally, the question of how non-magnetic inclusions (holes) affect the macroscopic and microscopic magnetic properties of the continuous film is of great interest [3][4][5][7][8][9][10].…”

Current-induced spin torque resonance of a magnetic insulator

“…Up to now, however, most spin transfer torque studies focused on metallic ferromagnets [4][5][6][7][8], while magnetic insulators received much less attention [9][10][11]. However, some magnetic insulators such as yttrium iron garnet (YIG) with extremely low magnetization damping [12] are well suited for the long-range transmission of signals via magnetization dynamics, and may harbor magnon condensates [13] or magnonic crystals [14]. Spin transfer torque and spin pumping [15] provide the communication channel for exploiting insulating magnetic materials in spintronic and electronic devices.…”

Nonreciprocity of spin waves in magnonic crystals created by surface acoustic waves in structures with yttrium iron garnet

“…Magnonic crystals represent a magnetic media with artificially created spatially periodic variations of some of their parameters sensitive for the spin waves [1,2]. A magnonic crystal exhibits magnonic band gaps in which the propagation of magnetic (spin or magnetostatic) waves is forbidden.…”