Inconsistencies in estimates of the spin Hall angle (${\ensuremath{\theta}}_{SH}$) and diffusion length (${\ensuremath{\lambda}}_{SD}$) nonmagnetic (NM) layers using transfer torque ferromagnetic resonance (ST-FMR) FM/NM bilayer structures are attributed to inverse effect (ISHE) interfacial parameter contributions, interface transparency, anisotropic magnetoresistance, effective spin-mixing conductance. These contributions Fe(10 nm)/Pd(2--8 nm) have been probed employing simultaneous...

We present a direct experimental investigation of the thermal ordering in an artificial analogue asymmetric two-dimensional Ising system composed rectangular array nano-fabricated magnetostatically interacting islands. During fabrication and below critical thickness magnetic material islands are thermally fluctuating thus is able to explore its phase space. Above freeze-in resulting arrested thermalized state for array. Determining we demonstrate genuine which can be analyzed context nearest...

A hot-deformed Nd-Fe-B sample has been chosen for the investigation of interaction domains by means magnetic force microscopy. During imaging process, a field up to 6 T was applied in situ along easy axis magnetization. The thermally demagnetized state presents regular pattern with an average width about 1 μm but much larger length scale. Starting from state, magnetization initial curve occurs via sequential switching neighboring grain columns at peripheries domains. Demagnetization...

Epitaxial niobium-nitride thin films with a critical temperature of Tc=16K and thickness 100nm were fabricated on MgO(100) substrates by pulsed laser deposition. Low-temperature magnetic force microscopy (MFM) images the supercurrent vortices measured after field cooling in 3mT at various temperatures. Temperature dependence penetration depth has been evaluated two-dimensional fitting vortex profiles monopole-monopole model. Its subsequent fit to single s-wave gap function results...

In order to explain and predict the properties of many physical systems, it is essential understand interplay different energy-scales. Here we present investigations magnetic in thermalised artificial spin ice structures, with activation energies interacting Ising-like elements. We image thermally equilibrated states nano-structures using synchrotron-based microscopy. By comparing results obtained from structures one or two energies, demonstrate a clear impact on resulting order. The...

Abstract The properties of natural and artificial assemblies interacting elements, ranging from Quarks to Galaxies, are at the heart Physics. collective response dynamics such dictated by intrinsic dynamical building blocks, nature their interactions topological constraints. Here we report on relaxation magnetization mesoscopic spins. In our model nano-magnetic system - square spin ice – able control geometrical arrangement interaction strength between magnetically blocks means...

Understanding the binding mechanism between probe-functionalized magnetic nanoparticles (MNPs) and DNA targets or amplification products thereof is essential in optimization of biosensors for detection DNA. Herein, molecular interaction forming hybrid structures upon hybridization DNA-functionalized nanoparticles, exhibiting Brownian relaxation, rolling circle (DNA-coils) investigated by use atomic force microscopy a liquid environment measuring frequency-dependent response modulation light...

We report on the study of thermal dynamics square artificial spin ice, probed by means temperature- and frequency-dependent ac susceptibility. Pronounced influence interisland coupling strength was found frequency response samples. Through subsequent analysis frequency- coupling-dependent freezing temperatures, we discuss phenomenological parameters obtained in framework Vogel-Fulcher-Tammann law terms samples' microscopic features. The high sensitivity robust signal to noise ratio...

The Curie temperature (Tc) of amorphous FeZr alloys can be greatly enhanced by doping with light elements. In this investigation, ion implantation is used to dope Fe93Zr7 thin films H, He, B, C, and N. Extended X-ray absorption fine structure measurements confirm that the preserved upon for all samples, except N-implanted sample which partially crystallized. increases from 124 K pristine about 400 (FeZr)B0.11 sample. increase Tc proportional in average Fe-Fe distance, allows us conclude...

Heterojunction copper-zinc oxide catalysts were prepared by a hybrid two-step methodology comprising hydrothermal growth of ZnO nanorods (ZnO-NR) followed deposition Cu2O nanoparticles using an advanced gas technique (AGD). The obtained bicatalysts characterized SEM, AFM, XRD, XPS, PL and spectrophotometry revealed well-dispersed crystalline attached to the ZnO-NR. adsorption properties photocatalytic degradation Orange II dye in water solutions measured. It was found that exhibited...

Alloys of AlCoCrFeMnxNi (x = 0.0, 0.04, 0.08, 0.12 and 0.16) have been synthesized through arc–melting gas atomisation 0.0 to investigate the effect Mn additions AlCoCrFeNi. Here, structure, magnetic properties thermal stability alloys is presented. Electron microscopy confirmed elemental composition revealed microstructure consist two spinodally decomposed phases. Rietveld analysis standard powder X-ray diffraction showed arc-melted samples consisted phases, a B2 phase bcc while atomised...

The interplay between topology and energy hierarchy plays a vital role in the collective magnetic order artificial ferroic systems. Here we investigate, experimentally, effect of having one or two activation energies interacting Ising-like islands---mesospins---in thermalized, vertex-frustrated lattices. thermally arrested states elements were determined using synchrotron-based microscopy after cooling samples from temperatures above Curie temperature material. Statistical analysis...

Spin and spatial dimensionalities are universal concepts, essential for describing both phase transitions dynamics in magnetic materials. Lately, these ideas have been adopted to describe properties of metamaterials, replicating the their atomic counterparts as well exploring ensembles mesospins belonging different universality classes. Here, we take next step when investigating metamaterials not conforming conventional framework continuous transitions. Instead a decrease moment with...

Abstract Electrification of vehicles and renewable energy is increasing the demand for permanent magnets, but cost scarcity rare‐earth metals an obstacle. Creating nanocomposites rigidly exchange‐coupled hard soft which magnetization reversal occurs as in a single magnetic‐phase material, promising route toward rare‐earth‐lean magnets with high products. The hard/soft exchange coupling is, however, often reduced due to rough interfaces structural defects, resulting exchange‐spring behavior...

We provide experimental and numerical evidence for thermal excitations within among magnetic mesospins, forming artificial spin ice structures. At low temperatures, a decrease in magnetization increase susceptibility is observed with increasing temperature, interpreted as an onset of fluctuations the texture mesospins. elevated temperatures pronounced peak observed, related to thermally induced flipping mesospins collapse remanent state. The fluctuations, while occurring at distinct length...

Abstract Alloys of Mn 55 Al 45 C 2 with additions VC nano-particles have been synthesized and their properties evaluated. The (VC) x ( = 0.25, 0.5 1) alloys prepared by induction melting resulting in a high content the ferromagnetic τ-phase (> 94 wt.%). Powder X-ray diffraction indicates that nano-VC can be dissolved alloy matrix up to 1 at.%. On other side, metallography investigations scanning electron microscopy transmission microscope show inclusions nanosized additives...

We demonstrate the presence of an emergent magnetic anisotropy in square lattices circular mesospins. An external field is used to saturate magnetization along [10] and [11] directions before quantifying textures at remanence. A clear directional dependence was obtained. The concomitant changes interactions are argued cause observed and, thereby, transition temperature

Spin-orbit torques in ferromagnetic/non-magnetic heterostructures offer more energy-efficient means to realize spin-logic devices; however, their strengths are determined by the heterostructure interface. This work examines impact of crystal orientation on spin-orbit torque efficiency different Fe/Pd bilayer systems. Results from spin ferromagnetic resonance measurements evidence that damping-like is higher epitaxial than polycrystalline structures while field-like negligible all structures....