Interfacial Dzyaloshinskii-Moriya interaction studied by time-resolved scanning Kerr microscopy

Symmetry- and curvature effects on spin waves in vortex-state hexagonal nanotubes

“…For example, the presence of an asymmetric interaction such as the Dzyaloshinskii-Moriya interaction (DMI) leads to an asymmetric dispersion and consequently to a nonreciprocal propagation of spin waves, * l.koerber@hzdr.de therein. [11][12][13][14][15][16][17][18][19][20][21] Similar non-reciprocal spin-wave propagation is observed in magnetic bilayers. [22][23][24] Therefore, the study of spin-wave propagation is both of a technological as well as a fundamental interest.…”

Symmetry and curvature effects on spin waves in vortex-state hexagonal nanotubes

“…Spin waves (including the spatially uniform ferromagnetic resonance precession) have also been proven to be an excellent tool to probe the magnetic characteristics of solids as they are sensitive to spin currents [4][5][6], impurities [7][8][9], crystal anisotropies [10], or asymmetric ex-* l.koerber@hzdr.de change interactions, among others. For example, the presence of an asymmetric interaction such as the Dzyaloshinskii-Moriya interaction (DMI) leads to an asymmetric dispersion and consequently to a nonreciprocal propagation of spin waves therein [11][12][13][14][15][16][17][18][19][20][21]. Similar nonreciprocal spin-wave propagation is observed in magnetic bilayers [22][23][24].…”

Direct Observation of Interfacial Dzyaloshinskii-Moriya Interaction from Asymmetric Spin-wave Propagation in W/CoFeB/SiO2 Heterostructures Down to Sub-nanometer CoFeB Thickness

“…Furthermore, the symmetric conventional exchange interaction (known as Heisenberg exchange interaction) produces quadratic dispersion, an even function of the wave number, while the antisymmetric DM exchange is characterized by an odd linear functional dependence 26 27 28 . The experiments manifesting these effects have been mostly confined to the thin film stacks that essentially contain Pt next to the ferromagnetic layer 20 23 29 30 . As the Pt/FM layer interface usually gives rise to significant interface anisotropy as well as interfacial DMI, isolation of both the contributions to the asymmetric spin-wave dispersion in such system is nontrivial.…”