Developing functional materials for optical remote control of magnetism can lead to faster, more efficient wireless data storage and sensing devices. In terms desired material properties, this development requires the combined optimization elastic interactions, low magnetic coercivity, a narrow linewidth ferromagnetic resonance establish low-loss dynamic functionalities. A general pathway achieve these requirements is still lacking. Here, we demonstrate that rare-earth trace element doping...

The in-plane correlation lengths and angular dispersion of magnetic domains in a transition metal multilayer have been studied using off-specular neutron reflectometry techniques. A theoretical framework considering both structural disorder has developed, quantitatively connecting the observed scattering to length local magnetization vector about mean macroscopic direction. antiferromagnetic domain structure is highly vertically correlated throughout multilayer. We are easily able relate...

Magnetoelectric composites are an important class of multiferroic materials that pave the way towards a new generation multifunctional devices directly integrable in data storage technology and spintronics. This study focuses on strain-mediated electrical manipulation magnetization extrinsic multiferroic. The composite includes 5 nm or 60 Fe$_{81}$Ga$_{19}$ thin films coupled to piezoelectric (011)-PMN-PZT. reversal reveals converse magnetoelectric coefficient $\alpha_\mathrm{CME,max}...

Thin films of Y2O3 were grown by molecular-beam epitaxy on silicon aiming at material with adequate crystal quality for use as high-κ gate replacements in future transistors. It was found that grows single-crystalline form 4° misoriented Si(001), due to an in-plane alignment 〈110〉Y2O2 the dimer direction. The layers exhibit a low degree mosaicity, small proportion twinning and sharp interfaces. This represents significant improvement compared exact surfaces.

The effect of the ratio between uniaxial and unidirectional anisotropy on magnetization reversal in NiFe∕MnPt bilayers has been systematically studied using vectorial vibrating magnetometer. Depending balance these two anisotropies reverses either opposite or same semicircles during ascending descending branches hysteresis loop. A simple modified coherent rotation model provides a good description bilayers.

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We report on experimental evidence of exchange bias between a polycrystalline antiferromagnetic BiFeO3 and ferromagnetic Ni81Fe19 film at room temperature. The measured 17 Oe hysteresis loop shift corresponds to an energy 11×10-3 erg/cm2 per unit area the interface coupling two films, which is comparable with those observed for similar epitaxially-grown systems. azimuthal behavior longitudinal transverse magnetization components revealed presence induced unidirectional biquadratic...

A hard axis hysteresis loop shift from the origin has been observed in exchange biased $\mathrm{Mn}\mathrm{Pt}∕\mathrm{Ni}\mathrm{Fe}$. model that accounts for is proposed. For correct description of experimental results, a misalignment between easy ferromagnetic and antiferromagnetic films $\mathrm{Mn}\mathrm{Pt}∕\mathrm{Ni}\mathrm{Fe}$ bilayers to be taken into account. An method measure noncollinear systems developed. The based on measurements loops at angles $\ensuremath{\pi}∕2$...

The dependence of the asymmetric magnetization reversal, exchange field, and coercive field on NiO microstructure thickness is studied in polycrystalline $\mathrm{Ni}∕\mathrm{Ni}\mathrm{O}$. Probing structural properties real reciprocal space, we show that modification growth conditions results nonstoichiometric NiO. Exchange fields are strongly enhanced $\mathrm{Ni}∕\mathrm{Ni}\mathrm{O}$ bilayers. trilayers, enhancements different origins but depend domain state. Modifying internal part...

An experimental method based on ferromagnetic resonance is proposed to quantify the misalignment between and antiferromagnetic easy axis in exchange biased systems. Our study deals with Ni81Fe19/Al2O3 Ni81Fe19/NiO bilayers. Performing studies, we demonstrate that present system. It revealed by an asymmetry of field angular dependence. Using a simple model, angle determined.

Experimental evidence for the relevance of nonuniform reversal modes to asymmetric magnetization is shown in a $\mathrm{Ni}∕\mathrm{NiO}$ polycrystalline system. The angular dependence asymmetry, exchange bias, and coercive field studied as function $\mathrm{NiO}$ structural disorder thickness. contribution coherent rotation depends on angle between applied ferromagnetic easy axis. We observe two distinct critical angles revealing significant role asymmetry its dependence.

We demonstrate that an in-plane uniaxial anisotropy may be induced in non-amorphous soft CoFeZr films. used broadband ferromagnetic resonance spectroscopy and complex permeability spectra to investigate the spin dynamics report a systematic study of FM thickness on fundamental dynamic parameters such as effective magnetisation, g-factor relaxation mechanisms. Our reveals decrease magnetisation mesured with FMR is not due perpendicular but low dimentionality. Moreover, we observed...

We present transport and structural data from epitaxial (100) (111) Au/Fe superlattices grown by molecular beam epitaxy. From their analysis, we conclude that an electron channeling mechanism, due to strong specular reflection of the minority spin carrier at interfaces, is responsible for high conductivity in superlattices.

Detailed structural studies of the growth Fe on Au(111) have resolved long-standing controversy about nature phase change in $\mathrm{Fe}∕\mathrm{Au}$ system. It has been thought that first few layers Au this orientation grew as fcc. Here we show grow epitaxially to form a rotated, strained face-centered structure. Subsequently entire layer relaxes via two distinct lattice distortions into bcc Fe.

Abstract Al/Ni multi‐layers, deposited by magnetron sputtering at room temperature have been studied complementary techniques; XPS, sputter depth profiling, electron‐induced X‐ray emission spectroscopy (XES) and diffraction (XRD). XPS profile technique evidenced an atomic diffusion dominated Ni atoms. Moreover, the results in formation of amorphous phase with a stoichiometry close to Al 3 aluminide. Copyright © 2008 John Wiley & Sons, Ltd.

Magnetization reversal processes of Permalloy exchange coupled with thin polycrystalline antiferromagnetic multiferroic BiFeO3 films were investigated. The critical thickness and the interfacial energy are comparable similar epitaxially grown systems. However, coercive field dependence on presents an atypical behaviour. This system shows induced unidirectional, uniaxial, biquadratic-like behaviour misalignment magnetic easy axis respect to pinning direction.

The temperature dependence of exchange bias properties are studied in polycrystalline bilayers, for different thicknesses. Using a field cooling protocol, non-monotonic behavior the is shown exchange-biased bilayers. Another thermal Soeya related to activation energies was carried out and reveals two-step evolution field. results these two protocols similar ones obtained measurements previously reported on epitaxial , indicating driving mechanism independent long-range crystalline...

Abstract Using strain to control magnetic properties through anisotropy changes is a method create functional materials with energy efficient applications. The can be inferred remotely by the light-induced non-thermal dimension change of named photostrictive effect. Still, dynamic via this effect pursued. need physical quantity encompass and describe anisotropic magnetization under also remaining. Here, visible light used engineer static in multiferroic material. A converse...

In magnetization dynamics, the relaxation is driven by damping. Here, we demonstrate that damping in exchange-coupled systems not only anisotropic but also unidirectional evidenced an asymmetry inversion of magnetic field polarity. Our study reveals this enhanced increase exchange bias field. Finally, introduce a modified term equation motion.

Exchange anisotropy occurs at the interface between an antiferromagnetic (AF) layer and a ferromagnetic layer, results in ferromagnet hysteresis loop displaced along field axis. We have performed off-specular neutron reflectometry order to characterize domain structure Co layers that are exchange biased by FeMn. This allows us determine direction distributions lateral magnetic correlation lengths for as function of with bias two different thermally prepared states: high cooled zero cooled....

The effect of multiaxial mechanical stress on angle-dependent magnetization reversals is studied a single 10-nm ${\mathrm{Ni}}_{80}{\mathrm{Fe}}_{20}$ film, ${\mathrm{Fe}}_{81}{\mathrm{Ga}}_{19}$ and ${\mathrm{Ni}}_{80}{\mathrm{Fe}}_{20}$(10 nm)/${\mathrm{Fe}}_{81}{\mathrm{Ga}}_{19}$(10 nm) bilayer. These films are grown flexible $\mathrm{Al}$ ``kitchenlike'' foils. foils bent two convex optical lenses to apply stresses different magnitudes. In order understand the mechanisms driving...

We report the effect of plasma treatment on TiN films in N2/H2 atmosphere grown by chemical vapor deposition. The physical parameters and evolution film as a function duration was studied using grazing incidence x-ray reflectivity (GIXR). From analysis GIXR we obtained electron density profile its depth. data were analyzed matrix method distorted wave Born approximation scheme. Comparison both schemes gives proper interpretation obtained. results from are supported time flight secondary ion...