Abstract Interfacial Dzyaloshinskii-Moriya interaction (IDMI) is important for its roles in stabilizing the skyrmionic lattice as well soliton-like domain wall motion leading towards new generation spintronic devices. However, achievement and detection of IDMI often hindered by various spurious effects. Here, we demonstrate occurrence originating primarily from W/CoFeB interface technologically W/CoFeB/SiO 2 heterostructures using Brillouin light scattering technique. Due to presence IDMI,...

The alloys of copper and iron which have been studied show unusual magnetic properties both in the saturation effects at low temperatures apparent change moment dissolved atoms over range from 14\ifmmode^\circ\else\textdegree\fi{}K to 1300\ifmmode^\circ\else\textdegree\fi{}K. Further research is required on other alloy systems containing transition elements noble metals order ascertain whether phenomena are due fundamental or state aggregation atoms.

Magnetic measurements were made on a gold-iron alloy containing 37 atomic percent iron, both in the quenched and successively annealed states. It was found that supersaturated solid solution is ferromagnetic. When this gradually heated up, perceptible precipitation took place at about 450°C. Both final gold-rich iron-rich phases precipitated 450°C to be magnetic room temperatures. measurements, checked by Debye-Scherrer patterns, indicate mechanism of mainly non-uniform type.

We experimentally investigate thickness $(t)$-dependent evolution of structural and magnetic properties in $\mathrm{C}{\mathrm{o}}_{2}\mathrm{F}{\mathrm{e}}_{0.4}\mathrm{M}{\mathrm{n}}_{0.6}\mathrm{Si}$ (CFMS) thin films correlate them with ultrafast demagnetization time $({\ensuremath{\tau}}_{\mathrm{d}})$ relaxation $({\ensuremath{\tau}}_{1})$ as well the Gilbert damping coefficient ($\ensuremath{\alpha}$). Structural ordering parameters, including $\ensuremath{\alpha}$, exhibit a...

Heusler alloys are attractive for spintronic applications, but them it is challenging to realize enhanced spin polarization with very low magnetic damping, independent of other parameters such as thickness and spin-wave frequency. By choosing a suitable underlayer chromium the deposition alloy on MgO substrate, authors obtain well-ordered thickness- frequency-independent without spoiling its intrinsic properties. This an important advance device fabrication.

We study the spin-wave dynamics in nanoscale antidot lattices based on Co/Pd multilayers with perpendicular magnetic anisotropy. Using time-resolved magneto-optical Kerr effect measurements we demonstrate that variation of shape introduces significant change spectra, especially lower frequency range. By employing micromagnetic simulations show additional peaks observed measured spectra are related to narrow shell regions around antidots, where anisotropy is reduced due Ga+ ion irradiation...

The electronic band-structure controlled ultrafast demagnetization mechanism in $\mathrm{C}{\mathrm{o}}_{2}\mathrm{F}{\mathrm{e}}_{x}\mathrm{M}{\mathrm{n}}_{1\ensuremath{-}x}\mathrm{Si}$ Heusler alloy is underpinned by systematic variation of composition. We find the spin-flip scattering rate spin density states at Fermi level responsible for nonmonotonic time (${\ensuremath{\tau}}_{\mathrm{M}}$) with $x$ a maximum $x=0.4$. Furthermore, Gilbert damping constant exhibits an inverse...

Ever since its discovery in 1996, ultrafast demagnetization has ignited immense research interest due to scientific rigor and technological potential. A flurry of recent theoretical experimental investigations proposed direct indirect excitation processes separate systems. However, it still lacks a unified mechanism remains highly debatable. Here, we demonstrate that instead either or interaction, simultaneous controlled both mechanisms is possible multilayers composed repeated Co/Pd...

Control of Gilbert damping parameter is imperative for various spintronic and magnonic devices, schemes have been attempted to achieve that. We report a large tunability by varying the underlayer CoFeB thin film from few-layer graphene (FLG) graphite layer. measured ultrafast magnetization dynamics CoFeB, FLG/CoFeB, graphite/CoFeB using time-resolved magneto-optical Kerr effect (TR-MOKE) magnetometry. While precession frequency remained independent underlayer, very variation (∼200%) in value...

Abstract Active control over the generation and manipulation of pure spin current has propelled drastic transformation in new spintronics. Spin pumping is one favored mechanisms to generate its efficiency can be parameterized terms spin‐mixing conductance () spin‐diffusion length ( λ ). Here, using all‐optical time‐resolved magneto‐optical Kerr magnetometry, a ferromagnetic Heusler compound (Co 2 Fe 0.4 Mn 0.6 Si (CFMS))/Pt heterostructure investigated keeping mind small intrinsic damping...

A search for indirect evidence of the existence superstructures Fe${\mathrm{Ni}}_{3}$ and ${\mathrm{Fe}}_{2}$${\mathrm{Ni}}_{2}$ by a magnetic method is described. In preliminary test, it was found that annealing at temperature around 450\ifmmode^\circ\else\textdegree\fi{}C two to three days followed slow cooling rate about 40\ifmmode^\circ\else\textdegree\fi{}C per hour increased saturation magnetization 3.9 percent in Permalloy 1.3 Hipernik over values after alloys were quenched from above...

We consider the planar magnonic waveguide with a periodic sequence of antidots forming zig-zag pattern, where two neighboring are shifted towards opposite edges waveguide. This system has complex base in one unit cell. The Brillouin zone is here two-times narrower than for without displacement antidots. have shown that dispersion relation folded into zone, new frequency gap can be opened and their width controlled by shift found that, different strength spin wave pinning at (and...

In the attempts to derive from theory magnetization curve, in region of rotational magnetization, for well annealed ferromagnetic polycrystals, a generally recognized complication is possible existence internal fields caused by out alignment vectors grains. However, if such do not really exist, simple deduction usual formal treatment predicts that curves same crystalline structure and having sign values principal anisotropy constant, can be brought into coincidence expressing intensity field...

Ever since its discovery in 1996, ultrafast demagnetization has ignited immense research interest due to scientific rigor and technological potential. A flurry of recent theoretical experimental investigations proposed direct indirect excitation processes separate systems. However, it still lacks a unified mechanism remains highly debatable. Here, for the first time, we demonstrate that instead either or interaction, simultaneous controlled both mechanisms are possible multilayers composed...