15 Topological Dynamics of Spin Texture Based Metamaterials
409
Fig. 15.2 Schematic diagram of the rotational motion of a Néel-type skyrmion in a thin ferromagnetic film driven by an optical vortex with radial index n = 1 and OAM quantum number l = 3. The
solid circle with a red core represents the skyrmion. The flower-like pattern (pink and blue spots)
sketches the induced magnetization profile by the optical vortex field shinning on the magnetic film.
Images are taken from [102]
Néel skyrmion
-1
1
0
d
arg(m x +im y )
0
L
B
H
R
U
n z
k
5
l
ˆ
ρ
ˆ
φ
ˆ
z
Fig. 15.3 Schematic illustration of a heterostructured nanocylinder exchange-coupled to a chiral
magnetic nanodisk hosting a Néel-type skyrmion. An external static field H is applied along the
z-direction. A spin-wave beam with the wavevector k and OAM quantum number l = −5 is excited
by a localized microwave field B, leading to a steady skyrmion gyration around the disk center.
Images are taken from [103]
409
Fig. 15.2 Schematic diagram of the rotational motion of a Néel-type skyrmion in a thin ferromagnetic film driven by an optical vortex with radial index n = 1 and OAM quantum number l = 3. The
solid circle with a red core represents the skyrmion. The flower-like pattern (pink and blue spots)
sketches the induced magnetization profile by the optical vortex field shinning on the magnetic film.
Images are taken from [102]
Néel skyrmion
-1
1
0
d
arg(m x +im y )
0
L
B
H
R
U
n z
k
5
l
ˆ
ρ
ˆ
φ
ˆ
z
Fig. 15.3 Schematic illustration of a heterostructured nanocylinder exchange-coupled to a chiral
magnetic nanodisk hosting a Néel-type skyrmion. An external static field H is applied along the
z-direction. A spin-wave beam with the wavevector k and OAM quantum number l = −5 is excited
by a localized microwave field B, leading to a steady skyrmion gyration around the disk center.
Images are taken from [103]