Among van der Waals (vdW) layered ferromagnets, Fe3GeTe2 (FGT) is an excellent candidate material to form FGT/heavy metal heterostructures for studying the effect of spin-orbit torques (SOT). Its metallicity, strong perpendicular magnetic anisotropy built in single atomic layers, relatively high Curie temperature (Tc about 225 K) and electrostatic gate tunability offer a tantalizing possibility achieving ultimate SOT limit monolayer all-vdW nanodevices. The spin current generated Pt exerts...

Pure spin current, a flow of angular momentum without any companying net charge, is generated in two common ways. One makes use the Hall effect normal metals (NM) with strong spin-orbit coupling, such as Pt or Ta. The other utilizes collective motion magnetic moments waves quasi-particle excitations called magnons. A popular material for latter yttrium iron garnet, insulator (MI). Here we demonstrate NM/MI/NM trilayers that these types currents are interconvertible across interfaces,...

Two-dimensional ferromagnet Cr2Ge2Te6 (CGT) is so resistive below its Curie temperature that probing magnetism by electrical transport becomes extremely difficult. By forming heterostructures with Pt, however, we observe clear anomalous Hall effect (AHE) in 5 nm thick Pt deposited on thin (< 50 nm) exfoliated flakes of CGT. The AHE hysteresis loops persist to ~ 60 K, which matches well the CGT obtained from bulk magnetization measurements. slanted a narrow opening indicate magnetic domain...

Fine-tuning of the morphology from two-dimensional (2D) to three-dimensional (3D) nanostructures by structural engineering leads improved biosensing. Herein, a 3D assembly MXene and rGO nanosheets was synthesized hydrothermal process, then, naturally abundant promising biosensing catalyst Cu2O added coprecipitation method prepare ternary composite (MXene graphene aerogel–Cu2O composite). The prepared nanocomposite characterized X-ray diffraction, field emission scanning electron microscopy...

A layer-by-layer epitaxial growth up to 227 atomic layers of ferrimagnetic insulator yttrium iron garnet (YIG) thin films is achieved on (110)-oriented gadolinium gallium substrates using pulsed laser deposition. Atomically smooth terraces are observed YIG 100 nm in thickness. The root-mean-square roughness as low 0.067 nm. easy-axis lies the film plane, indicating dominance shape anisotropy. For (110)-YIG films, there well-defined two-fold in-plane anisotropy, with easiest axis directed...

We report a longitudinal spin Seebeck effect (SSE) study in epitaxially grown ${\mathrm{FeF}}_{2}(110)$ antiferromagnetic (AFM) thin films with strong uniaxial anisotropy over the temperature range of 3.8--250 K. Both magnetic-field and temperature-dependent SSE signals below N\'eel (${T}_{N}=70\text{ }\text{ }\mathrm{K}$) ${\mathrm{FeF}}_{2}$ are consistent theoretical model based on excitations AFM magnons without any net induced static magnetic moment. In addition to characteristic...

We show tunable strain-induced perpendicular magnetic anisotropy (PMA) over a wide range of thicknesses in epitaxial ferrimagnetic insulator Eu3Fe5O12 (EuIG) and Tb3Fe5O12 (TbIG) thin films grown by pulsed-laser deposition on Gd3Ga5O12 with (001) (111) orientations, respectively. The PMA field is determined measuring the induced anomalous Hall loops Pt deposited garnet films. Due to positive magnetostriction constants, compressive in-plane strain induces as large 32.9 kOe for 4 nm thick EuIG...

We use temperature-dependent Hall measurements to identify contributions of spin Hall, magnetic proximity, and sublattice effects the anomalous signal in heavy metal/ferrimagnetic insulator heterostructures with perpendicular anisotropy. This approach enables detection both proximity effect onset temperature magnetization compensation provides essential information regarding interfacial exchange coupling. Onset a yields local extremum signal, which occurs at higher as thickness increases....

Abstract We experimentally study nanowire-shaped spin-Hall nano-oscillators based on nanometer-thick epitaxial films of Yttrium Iron Garnet grown top a layer Pt. show that, although these are characterized by significantly larger magnetic damping in comparison with the directly Gadolinium Gallium Garnet, they allow one to achieve spin current-driven auto-oscillations at comparable current densities, which can be an indication better transparency interface current. These observations suggest...

Abstract Supercapacitors are pivotal for the advancement of energy storage technologies, offering unparalleled power density and rapid charge–discharge cycles essential modern electronic automotive applications. Combining different materials is a powerful approach to enhancing electrochemical properties each constituent. In current report, we examine structural, morphological, characteristics pure NiCo 2 O 4 4% -5% Ti 3 AlC composite. The pristine fabricated utilizing Sol–Gel auto-combustion...

Quantum anomalous Hall state is expected to emerge in Dirac electron systems such as graphene under both sufficiently strong exchange and spin-orbit interactions. In pristine graphene, neither interaction exists; however, interactions can be acquired by coupling a magnetic insulator revealed the effect. Here, we show enhanced proximity sandwiching between ferrimagnetic yttrium iron garnet (YIG) hexagonal-boron nitride (h-BN) which also serves top gate dielectric. By sweeping top-gate...

Ferrimagnetic insulators promise low-power and high-speed spintronic applications, thanks to their insulating nature fast dynamics near compensation points. In a ferrimagnetic insulator/heavy metal heterostructure, we investigate field- current-induced magnetization switching at various temperatures observe distinct behaviors owing spin–orbit torque (SOT) heating effect. We have realized SOT across the temperature discovered that is strongly heat-assisted: always above while happens in our...

Like air flowing over a wing, optimizing the flow of electronic charge is essential to operation nanoscale devices. Unfortunately, delicate interplay charge, spin, and heat in complex devices has precluded detailed imaging flow. Here, we report on visualization intrinsic current streamlines through yttrium iron garnet micromagnetic heterostructures. Scanning photovoltage microscopy precisely designed leads striking spatial patterns, with prominent features emerging corners narrow...

30-80 nm thick yttrium iron garnet (YIG) films are grown by pulsed laser deposition on a 5 sputtered Pt atop gadolinium gallium substrate (GGG) (110). Upon post-growth rapid thermal annealing, single crystal YIG(110) emerges as if it were epitaxially GGG(110) despite the presence of intermediate film. The YIG surface shows atomic steps with root-mean-square roughness 0.12 flat terraces. Both Pt/YIG and GGG/Pt interfaces atomically sharp. resulting show clear in-plane uniaxial magnetic...

Electrical currents in a magnetic-insulator/heavy-metal heterostructure can induce two simultaneous effects, namely, spin Hall magnetoresistance (SMR) on the heavy-metal side and spin-orbit torques (SOTs) magnetic-insulator side. Within framework of pure current model based bulk effect (SHE), ratio Hall-induced anomalous (SH-AHE) to SMR should be equal fieldlike torque (FLT) dampinglike (DLT). We perform quantitative study SMR, SH-AHE, SOTs series thulium iron garnet/platinum or...

Ferromagnetic resonance and spin waves have been used in miniaturized devices for rf microwave applications, but large magnetic bias fields are required the high frequencies at which most satellites operate, example. Exploiting perpendicular standing an innovative way, authors excite spin-wave above 20 GHz with below 100 Oe, can be realized small, lightweight permanent magnets, or electromagnets current sources that would not require cooling.

Understanding and tailoring static dynamic properties of magnetic insulator thin films is important for spintronic device applications. Here, we grow atomically flat epitaxial europium iron garnet (EuIG) by pulsed laser deposition on (111)-oriented substrates with a range lattice parameters. By controlling the mismatch between EuIG substrates, tune strain in from compressive to tensile regime, which characterized x-ray diffraction. Using ferromagnetic resonance (FMR), find that, addition...

We investigate picosecond spin-currents across Au/iron-garnet interfaces in response to ultrafast laser heating of the electrons Au film. In picoseconds after optical heating, interfacial spin currents occur due an temperature difference between metal and magnons insulator. report measurements this longitudinal Seebeck effect rare-earth iron-garnet insulators, i.e. RE$_3$ Fe$_5$O$_{12}$, where RE is Y, Eu, Tb, Tm. use time domain thermoreflectance (TDTR) characterize thermal bilayer heating....

Abstract Thin film technology has emerged as a cornerstone in optoelectronics, enabling the fabrication of compact, lightweight devices with enhanced performance and efficiency through precise control nanoscale thicknesses functional materials. The current study explores impact copper (Cu) doping (3.125%, 6.25%, 12.5%) on lead (Pb) sites PbS to examine structural, morphological, electronic, optical, thermoelectric characteristics, employing both experimental theoretical approaches....

The spin Seebeck effect (SSE) signal of magnon polarons in bulk-Y_{3}Fe_{5}O_{12} (YIG)/Pt heterostructures is found to drastically change as a function temperature. It appears dip the total SSE at low temperatures, but temperature increases, gradually decreases before turning peak. We attribute observed dip-to-peak transition rapid rise four-magnon scattering rate. Our analysis provides important insights into microscopic origin hybridized excitations and overall dependence anomalies.

Understanding and tailoring static dynamic properties of magnetic insulator thin films is important for spintronic device applications. Here, we grow atomically flat epitaxial europium iron garnet (EuIG) by pulsed laser deposition on (111)-oriented substrates with a range lattice parameters. By controlling the mismatch between EuIG substrates, tune strain in from compressive to tensile regime, which characterized X-ray diffraction. Using ferromagnetic resonance, find that addition...

Double perovskites are an emerging class of functional materials with a great deal durability perspective owing to their inherent flexibility in cation coordination selection. Here, we synthesized pristine and Cu2+-doped Ba2NiWO6 utilizing the solid-state reaction route investigate structural, morphological, dielectric behavior. Structural examination revealed development cubic crystal structure for both compositions, Cu2+ integration decreases crystallite size. The spherical-shaped grains...

We report a longitudinal spin Seebeck effect (SSE) study in epitaxially grown FeF2(110) antiferromagnetic (AFM) thin films with strong uniaxial anisotropy over the temperature range of 3.8 - 250 K. Both magnetic field- and temperature-dependent SSE signals below N\'eel (TN=70 K) FeF2 are consistent theoretical model based on excitations AFM magnons without any net induced static moment. In addition to characteristic low-temperature peak associated magnons, there is another at TN which...

Quantum anomalous Hall state is expected to emerge in Dirac electron systems such as graphene under both sufficiently strong exchange and spin-orbit interactions. In pristine graphene, neither interaction exists; however, interactions can be acquired by coupling a magnetic insulator (MI) revealed the effect. Here, we show enhanced proximity sandwiching between ferrimagnetic yttrium iron garnet (YIG) hexagonal-boron nitride (h-BN) which also serves top gate dielectric. By sweeping top-gate...