Abstract Ferromagnetic materials exhibiting low magnetic damping ( α ) and moderately high-saturation magnetization are required from the viewpoints of generation, transmission, detection spin waves. Since spin-to-charge conversion efficiency is another important parameter, high mixing conductance $$({g_{r}^{\uparrow \downarrow}})$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mo>(</mml:mo> <mml:msubsup> <mml:mi>g</mml:mi> </mml:mrow> <mml:mi>r</mml:mi>...

Bi2Se3 is a well-established topological insulator (TI) having spin momentum locked Dirac surface states at room temperature and predicted to exhibit high charge conversion efficiency (SCCE) for spintronics applications. The SCCE in TIs characterized by an inverse Edelstein effect length (λIREE). We report λIREE of ∼0.36 nm, which the highest ever observed Bi2Se3. Here, we performed pumping Hall (ISHE) electron beam-evaporated Bi2Se3/CoFeB bilayer. thickness dependence λIREE, perpendicular...

Noncollinear antiferromagnetic (AFM) materials have drawn research interest because they exhibit large anomalous Hall effect at room temperature (RT) due to Berry curvature. ${\mathrm{Mn}}_{3}\mathrm{Ga}$ is a noncollinear AFM in which the order of Mn magnetic moments arranged inverse triangular configuration on kagome lattice. It makes promising candidate for spin (ISHE) study has not been studied before. In this work, investigation ISHE and pumping polycrystalline...

We investigated the dependence of seed [Ta/Pt, Ta/Au] and capping [Pt/Ta, Au/Ta] layers on spin pumping effect in ferromagnetic 3 nm thick Co thin film using resonance spectroscopy. The data is fitted with Kittel equation to evaluate damping constant g-factor. A strong has been discussed. value {alpha} found be relatively large i.e. 0.0326 for Ta{3}/Pt{3}/Co{3}/Pt{3}/Ta{3} {nm} multi-layer structure, while it 0.0104 Ta{3}/Co{3}/Ta{3} {nm}. Increase observed due Pt layer that works as a good...

We have performed micromagnetic simulations to study the formation of skyrmions in ferromagnetic elements with different shapes having perpendicular anisotropy. The strength Dzyaloshinskii-Moriya interaction (D) and uniaxial anisotropy (K) are varied elucidate regime which skyrmion can take place. It is found that for a certain combination D K does not happen. Further we also observed large small values, finite size effect dominates turn hinders typical N'eel (spherical) skyrmions. However...

Manganites are an interesting class of materials because they exhibit high spin polarization and low damping. We observed both pumping anti-damping in La_0.67Sr_0.33MnO₃/Pt system which makes it promising for future spintronic applications.

Spintronics exploiting pure spin current in ferromagnetic (FM)/heavy metals (HM) is a subject of intense research. Topological insulators having momentum locked surface states exhibit high spin–orbit coupling and thus possess huge potential to replace the HM like Pt, Ta, W, etc. In this context, pumping phenomenon Bi 2 Se 3 /CoFeB bilayers has been investigated. thin films are fabricated by electron beam evaporation method on Si (100) substrate. order confirm topological nature , low...

We have observed the effect of spin glass frustration on exchange bias properties in NiMn (<italic>t</italic> nm)/CoFeB (5 nm) bilayers.

MgO based magnetic tunnel junctions (MTJs) exhibit high tunneling magnetoresistance (TMR) and have potential applications in random access memories. This study addresses the role of interface Fe/MgO/Fe MTJs. For present investigation, multilayer stack on Si substrates is grown by electron beam evaporation method has been investigated for structural, electronic properties. All layers were polycrystalline nature as evidenced from X-ray diffraction studies, measurements show attributes...

High spin to charge conversion efficiency is a requirement for spintronic devices, which are governed by pumping and the inverse Hall effect (ISHE). In last decade, ISHE have been heavily investigated in ferromagnet/heavy metal (HM) heterostructures. Recently, antiferromagnetic (AFM) materials found be good replacement HMs because AFMs exhibit terahertz dynamics, high spin–orbit coupling, absence of stray field. this context, we performed CoFeB/IrMn Spin studies carried out Co40Fe40B20(12...

Abstract Large spin‐to‐charge conversion (spin Hall angle) and spin conductivity are prerequisites for development of next generation power efficient spintronic devices. In this context, heavy metals (e.g., Pt, W, etc.), topological insulators, antiferromagnets usually considered because they exhibit high spin–orbit coupling (SOC). addition to the above materials, 5d transition metal oxide, example, iridium oxide (IrO 2 ) is a potential candidate which exhibits SOC strength. Here study...

The effect of variation in the thickness ion assisted beam sputtered MgO spacer layer deposited at oxygen energy 50 eV on extent magnetic coupling NiFe and CoFe layers Si/NiFe(10 nm)/Mg(1 nm)/MgO(2,4,6 nm)/CoFe(10 nm) sandwich structure is investigated. At 4 nm, separate reversal magnetizations two ferromagnetic observed hystresis loop recorded along easy direction. This results a 3.5 Oe wide plateau like region during magnetization reversal, which became 4.5 6 nm thin MgO. 2 MgO, absence...

Co thin films on Si (1 0 0) substrates with different seed layers (Au or AlOX) have been deposited for variable speed of substrate rotation (Rsub) at room temperature (RT) 200 °C. Hysteresis measurements by magneto optic Kerr effect reveals that the show growth induced uniaxial anisotropy when prepared without (i.e. Rsub = rpm). The RT a decrease but non-vanishing increase in Rsub. However, high deposition along leads to formation isotropic films. change has quantitatively investigated using...

Antiferromagnetic materials (AFMs) have recently been attracting interest in research on spintronics due to their zero stray magnetic field, high anisotropy, and spin-orbit coupling. In this context, the bimetallic AFM ${\mathrm{Mn}}_{2}\mathrm{Au}$ has drawn attention because it exhibits unique properties its N\'eel temperature is very (${T}_{N}=1500\phantom{\rule{0.2em}{0ex}}\mathrm{K}$). Here, we report investigations of spin pumping inverse Hall effect (ISHE) a...

Abstract Skyrmion racetrack memory has a lot of potential in future non-volatile solid state devices. By application current such devices, both spin-orbit torque and spin-transfer torques are proven to be useful nucleate propagate skyrmions. However, the applied during nucleation successive skyrmions may have unwanted perturbation viz. Joule heating skyrmion Hall effect, on propagation previously generated Therefore, new methodology is desired decouple generation Here, we present novel route...

Controlled tuning of magnetic anisotropy and damping is essential in ferromagnetic systems for various spintronic applications. In this context, bilayers with different thicknesses soft (Co) hard (Co40Fe40B20) layers have been prepared using magnetron sputtering technique by alternating the order constituent layers. We observed an increase coercive field (HC) increasing thickness Co layer. Further, same layers, HC increases case when CoFeB at bottom Co. further show that deposition...

The demand of fast and power efficient spintronic devices with flexibility requires additional energy for magnetization manipulation. Stress/ strain have shown their potentials tuning magnetic properties to the desired level. Here, we report a systematic study effect both tensile compressive stresses on anisotropy (MA). Further stress domain structure relaxation mechanism in perpendicularly magnetized Co/Pt film has been studied. It is observed that minimal in-plane increased coercivity by...

L 1 0 -ordered magnetic alloys such as FePt, FePd, CoPt, and FeNi are well known for their large magnetocrystalline anisotropy. Among these, the L10-FeNi alloy is an economically viable material recording media because it does not contain rare earth noble elements. In this work, films with three different strengths of anisotropy were fabricated by varying deposition process in a molecular beam epitaxy system. We have investigated magnetization reversal along domain imaging via magneto-optic...

We present a comprehensive study on the magnetization reversal in Fe/NiFe bilayer system by alternating order of magnetic layers. All samples show growth-induced uniaxial anisotropy due to oblique angle deposition technique. Strong interfacial exchange coupling between Fe and NiFe layers leads single-phase hysteresis loops system. The strength being dependent interface changes upon parameters such as coercivity H C, field K become almost doubled when layer is grown over This enhancement...