Spin waves in ferrimagnetic yttrium iron garnet (YIG) films with ultralow magnetic damping are relevant for magnon-based spintronics and low-power wave-like computing. The excitation frequency of spin YIG is rather low weak external fields because its small saturation magnetization, which limits the potential high-frequency applications. Here, we demonstrate how exchange-coupling to a CoFeB film enables efficient perpendicular standing (PSSWs) nanometer-thick (80 nm 295 nm) using uniform...

Active manipulation of spin waves is essential for the development magnon-based technologies. Here, we demonstrate programmable spin-wave filtering by resetting structure pinned 90° Néel domain walls in a continuous CoFeB film with abrupt rotations uniaxial magnetic anisotropy. Using micro-focused Brillouin light scattering and micromagnetic simulations, show that broad head-to-head or tail-to-tail are transparent to over frequency range. In contrast, switching head-to-tail configuration...

Control of magnetic domain-wall motion by electric fields has recently attracted scientific attention because its potential for logic and memory devices. Here, we report on a new driving mechanism that allows in an applied field without the concurrent use or spin-polarized current. The is based elastic coupling between ferroelectric domain walls multiferroic heterostructures. Pure electric-field-driven demonstrated epitaxial Fe films BaTiO3 with in-plane out-of-plane polarized domains. In...

Abstract Miniaturization of magnonic devices for wave-like computing requires emission short-wavelength spin waves, a key feature that cannot be achieved with microwave antennas. In this paper, we propose tunable source waves based on highly localized and strongly pinned magnetic domain walls in ferroelectric-ferromagnetic bilayers. When driven into oscillation by spin-polarized current, the emit same frequency as excitation current. The amplitude emitted range attainable frequencies depend...

Control of spin waves in magnonic crystals is essential for magnon-based computing. Crystals made ferromagnetic metals offer versatility band structure design, but strong magnetic damping restricts their transmission efficiency. Yttrium iron garnet (YIG) with ultralow the palpable alternative, yet its small saturation magnetization limits dipolar coupling between discrete units. Here, we experimentally demonstrate low-loss spin-wave manipulation physically separated nanometer-thick YIG...

We present a comprehensive investigation of propagating spin waves in nanometer-thick yttrium iron garnet (YIG) films. use broadband spin-wave spectroscopy with integrated coplanar waveguides (CPWs) and microstrip antennas on top continuous patterned YIG films to characterize wave vectors up 10 rad/$\mu$m. All are grown by pulsed laser deposition. From transmission spectra, parameters such as the Gilbert damping constant, dispersion relation, group velocity, relaxation time, decay length...

In multiferroic heterostructures, regular ferroelectric-domain patterns can be imprinted in a continuous ferromagnetic film without any nanoscale patterning of its own. The authors demonstrate that confined and propagating spin waves are excited by microwave-frequency magnetic field such structures. wavelength the emitted is tunable via rotation an external bias field. Excitation active tuning short-wavelength essential to miniaturizing magnonic spintronic devices for signal processing...

We report a spin valve with few-layer graphene flake bridging highly spin-polarized La_{0.67}Sr_{0.33}MnO_{3} electrodes, whose surfaces are kept clean during lithographic definition. Sharp magnetic switching is verified using photoemission electron microscopy x-ray circular dichroism contrast. A naturally occurring high interfacial resistance ∼12 MΩ facilitates injection, and large resistive (0.8 at 10 K) implies 70-130 μm diffusion length that exceeds previous values obtained...

Magnetoelectric coupling in multiferroic heterostructures can produce large lateral modulations of magnetic anisotropy enabling the imprinting ferroelectric domains into ferromagnetic films. Exchange and magnetostatic interactions within films oppose formation such domains. Using micromagnetic simulations a one-dimensional model, we demonstrate that competing energies lead to breakdown domain pattern transfer below critical size. Moreover, rotation field results abrupt transitions between...

Strontium titanate (SrTiO_{3}) is the quintessential material for oxide electronics. One of its hallmark features transition, driven by antiferrodistortive (AFD) lattice modes, from a cubic to ferroelastic low-temperature phase. Here we investigate evolution twin walls upon application an electric field. Remarkably, find that dielectric anisotropy tetragonal SrTiO_{3}, rather than intrinsic domain wall polarity, main driving force motion twins. Based on combined first-principles and...

In elastically coupled multiferroic heterostructures that exhibit full domain correlations between ferroelectric and ferromagnetic sub-systems, magnetic walls are firmly pinned on top of boundaries. this work we investigate the influence magnetization reversal process in a Co40Fe40B20 wedge film is to BaTiO3 substrate via interface strain transfer. We show field direction can be used select two distinct mechanisms, namely (1) double switching events involving alternate stripe domains at time...

Using a magneto-optical pump-probe technique with micrometer spatial resolution we show that magnetization precession can be launched in individual magnetic domains imprinted Co$_{40}$Fe$_{40}$B$_{20}$ (CoFeB) layer by elastic coupling to ferroelectric BaTiO$_{3}$ substrate. The dependence of the parameters on external field strength and orientation reveal laser-induced ultrafast partial quenching magnetoelastic parameter CoFeB $\approx$27% along 10% demagnetization trigger precession....

Using ferromagnetic La0.67Sr0.33MnO3 electrodes bridged by single-layer graphene, we observe magnetoresistive changes of ∼32–35 MΩ at 5 K. Magneto-optical Kerr effect microscopy the same temperature reveals that magnetoresistance arises from in-plane reorientations electrode magnetization, evidencing tunnelling anisotropic La0.67Sr0.33MnO3-graphene interfaces. Large resistance switching without spin transport through non-magnetic channel could be attractive for graphene-based...

Magnetic domain walls are pinned strongly by abrupt changes in magnetic anisotropy. When driven into oscillation a spin-polarized current, locally can be exploited as tunable sources of short-wavelength spin waves. Here, we develop an analytical framework and discrete Heisenberg model to describe the static dynamic properties with head-to-tail structure. We focus on that 90$^\circ$ rotations uniaxial Our captures wall response spin-transfer torque is exerted electric current. Model...

Control of magnetic domain wall motion by electric fields has recently attracted scientific attention because its potential for logic and memory devices. Here, we report on a new driving mechanism that allows in an applied field without the concurrent use or spin-polarized current. The is based elastic coupling between ferroelectric walls multiferroic heterostructures. Pure electric-field driven demonstrated epitaxial Fe films BaTiO$_3$ with in-plane out-of-plane polarized domains. In this...

Spin waves in ferrimagnetic yttrium iron garnet (YIG) films with ultralow magnetic damping are relevant for magnon-based spintronics and low-power wave-like computing. The excitation frequency of spin YIG is rather low weak external fields because its small saturation magnetization, which limits the potential high-frequency applications. Here, we demonstrate how exchange-coupling to a CoFeB film enables efficient perpendicular standing (PSSWs) nanometer-thick (80 nm 295 nm) using uniform...