Fig. 3
From: Antiferromagnetic domain wall as spin wave polarizer and retarder
Micromagnetic simulation of spin wave polarizers. a An antiferromagnetic domain wall in a straight wire works as a y-polarizer. The four rows from top to bottom are: (i) spin wave excitations depicted on Bloch spheres, with the spin wave amplitude exagerated by 100 (200) times at the left (right) side. (ii) the static magnetization profile m 1 (red) and m 2 (blue). The Bloch sphere on the left shows that the magnetization in the domain wall rotates in the y–z plane with x-polarization suppressed, (iii–iv) the instantaneous wave form of the x and y component of the stagger order n x,y at a selected time. b An x-polarizer when the domain wall is at the center segment of a Z-turn wire, and the magnetization in the damain wall rotates in x–z plane with y-polarization suppressed. c A y-polarizer when the domain wall is at the left segment of a Z-turn wire, and the magnetization rotates in y–z plane with x-polarization suppressed. For all figures, the spin wave injected from left has circular polarization and frequency ω/2π = 8GHz (ω 1 in Fig. 2b, c). The damping coefficient in the simulation is α = 5 × 10−4. The wave form within the domain wall region is omitted
