Brillouin light scattering investigation of the thickness dependence of Dzyaloshinskii-Moriya interaction inCo0.5Fe0.5ultrathin films

Spin Waves in Thin Films and Magnonic Crystals with Dzyaloshinskii–Moriya Interactions

“…The first observation of nonreciprocal spin waves [16,68,69] caused by interfacial DMI was achieved by Zakeri et al [70,71] using the spin-polarized electron energy loss (SPEEL) experimental technique. A few years later, nonreciprocal spin waves were observed by means of BLS spectroscopy in several ferromagnet/heavy metal interfaces [72][73][74][75][76][77][78][79][80][81][82][83][84][85][86][87]. In agreement with the results of Zakeri et al [70,71], these numerous experiments have shown that interfacial DMI creates a noticeable frequency asymmetry in the spin-wave dispersion of counterpropagating Damon-Eshbach (DE) spin waves.…”

“…In particular, this numerical technique can be used to calculate the spectrum of spin waves, and when a DMI is present, it reveals different properties characteristic of these systems, such as the spin-wave asymmetry. In this context, simulations have successfully supported theoretical formulations [80,96,97,99,[132][133][134][135][136][137] and experimental measurements [72][73][74][75][76][77][78][79][80][81][82][83][84][85][86][87]138] on thin-film systems with a homogeneous DMI. A micromagnetic simulation is based on numerically discretizing the continuum description of the magnetic system into a mesh of magnetic moments whose arrangement depends on the discretization method.…”

“…Then, by measuring f , the strength of the interfacial DMI can be directly measured, as was theoretically proposed in Ref. [96], and then measured by several groups, mainly using BLS [72][73][74][75][76][77][78][79][80][81][82][83][84][85][86][87], as summarized in Tables 5.2 and 5.3. It is worth to mention that the estimation of the DMI strength through measurement of the frequency difference between counterpropagating spin waves, in the field-polarized case, should be the most reliable method, since there are no assumptions about the possible magnetic texture.…”

Voltage control of domain walls in magnetic nanowires for energy-efficient neuromorphic devices

“…In practice, defects and edge roughness are likely to impede the DW giving dynamics characteristic of the higher damping. [23,[39][40][41]. A higher value of Gilbert damping is chosen for the simulation.…”

Modelización de nanodispositivos magnéticos con especial énfasis en los fenómenos de acoplamiento espin-órbita

“…Besides, other phenomena that have been demonstrated to have a key role in the fast and efficient DW motion in multilayered systems must be considered. These phenomena are the Dzyaloshinskii-Moriya interaction [14,17,21,[37][38][39][40][41][42][43][44][45][46][47][48] (DMI) and the spin Hall effect [9,10,44,[49][50][51][52][53][54][55][56] (SHE). The origin of these effects is the strong spin-orbit coupling (SOC) of a heavy metal (HM) layer.…”