Ferran Macià
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View article: Magnetoacoustic waves in a highly magnetostrictive Fe72Ga28 thin film
Magnetoacoustic waves in a highly magnetostrictive Fe72Ga28 thin film Open
The interaction between surface acoustic waves and magnetization offers an efficient route for electrically controlling magnetic states. Here, we demonstrate the excitation of magnetoacoustic waves in galfenol thin films with a 28 at. % ga…
View article: Magnetoacoustic waves in a highly magnetostrictive FeGa thin film
Magnetoacoustic waves in a highly magnetostrictive FeGa thin film Open
The interaction between surface acoustic waves and magnetization offers an efficient route for electrically controlling magnetic states. Here, we demonstrate the excitation of magnetoacoustic waves in galfenol, a highly magnetostrictive al…
View article: Néel vector waves in antiferromagnetic CuMnAs excited by surface acoustic waves
Néel vector waves in antiferromagnetic CuMnAs excited by surface acoustic waves Open
Magnetoelastic effects in antiferromagnetic CuMnAs are investigated by applying dynamic strain in the 0.01% range through surface acoustic waves in the GaAs substrate. The magnetic state of the CuMnAs/GaAs is characterized by a multitude o…
View article: Study of the magnetoelastic effect in nickel and cobalt thin films at GHz range using x-ray microscopy
Study of the magnetoelastic effect in nickel and cobalt thin films at GHz range using x-ray microscopy Open
We use surface acoustic waves of 1 and 3 GHz in hybrid piezoelectric-magnetic systems with either nickel or cobalt as a magnetic layer to generate magnetoacoustic waves and directly image them using stroboscopic x-ray magnetic circular dic…
View article: Study of the magnetoelastic effect in nickel and cobalt thin films at GHz range using X-ray microscopy
Study of the magnetoelastic effect in nickel and cobalt thin films at GHz range using X-ray microscopy Open
We use surface acoustic waves of 1 and 3 GHz in hybrid piezoelectric-magnetic systems with either cobalt or nickel as a magnetic layer to generate magnetoacoustic waves and directly image them using stroboscopic X-ray magnetic circular dic…
View article: Magneto-Acoustic Waves in antiferromagnetic CuMnAs excited by Surface Acoustic Waves
Magneto-Acoustic Waves in antiferromagnetic CuMnAs excited by Surface Acoustic Waves Open
Magnetoelastic effects in antiferromagnetic CuMnAs are investigated by applying dynamic strain in the 0.01% range through surface acoustic waves in the GaAs substrate. The magnetic state of the CuMnAs/GaAs is characterized by a multitude o…
View article: Spin pumping in NbRe/Co superconductor-ferromagnet heterostructures
Spin pumping in NbRe/Co superconductor-ferromagnet heterostructures Open
Ferromagnetic resonance (FMR) spectroscopy measurements were performed on NbRe/Co/NbRe trilayers in order to probe spin pumping across the superconductor/ferromagnet interface and to detect the possible presence of spin-triplet pairing in …
View article: Resonant and off-resonant magnetoacoustic waves in epitaxial Fe$_3$Si/GaAs hybrid structures
Resonant and off-resonant magnetoacoustic waves in epitaxial Fe$_3$Si/GaAs hybrid structures Open
Surface acoustic waves (SAWs) provide an efficient dynamical coupling between strain and magnetization in micro/nano-metric devices. Using a hybrid device composed of a piezoelectric, GaAs, and a ferromagnetic Heusler alloy thin film, Fe$_…
View article: Efficient spin pumping into metallic SrVO3 epitaxial films
Efficient spin pumping into metallic SrVO3 epitaxial films Open
Spin pumping across interfaces between metallic SrVO3, where V is a 3d1 ion, epitaxial thin films and ferromagnetic Ni80Fe20 is reported. Data shows an efficient spin pumping with a spin mixing conductance value (g↑↓ = 11.8 × 1018 m− 2 ) s…
View article: Effect of the Zhang-Li torque on spin-torque nano-oscillators
Effect of the Zhang-Li torque on spin-torque nano-oscillators Open
Spin-torque nano-oscillators (STNO) are microwave auto-oscillators based on magnetic resonances having a nonlinear response with the oscillating amplitude, which provides them with a large frequency tunability including the possibility of …
View article: Magnetic droplet solitons
Magnetic droplet solitons Open
Magnetic droplet solitons are dynamical magnetic textures that form due to an attractive interaction between spin waves in thin films with perpendicular magnetic anisotropy. Spin currents and the spin torques associated with these currents…
View article: On the Promotion of Catalytic Reactions by Surface Acoustic Waves
On the Promotion of Catalytic Reactions by Surface Acoustic Waves Open
Surface acoustic waves (SAW) allow to manipulate surfaces with potential applications in catalysis, sensor and nanotechnology. SAWs were shown to cause a strong increase in catalytic activity and selectivity in many oxidation and decomposi…
View article: Generation and Imaging of Magnetoacoustic Waves over Millimeter Distances
Generation and Imaging of Magnetoacoustic Waves over Millimeter Distances Open
Using hybrid piezoelectric-magnetic systems we have generated large amplitude magnetization waves mediated by magnetoelasticity with up to 25 degrees variation in the magnetization orientation. We present direct imaging and quantification …
View article: Acoustic Spin Waves
Acoustic Spin Waves Open
Using hybrid piezoelectric/magnetic systems we have generated large amplitude magnetization waves mediated by magneto-elasticity with up to 25 degrees variation in the magnetization orientation. We present direct imaging and quantification…
View article: Effect of temperature on magnetic solitons induced by spin-transfer torque
Effect of temperature on magnetic solitons induced by spin-transfer torque Open
Spin-transfer torques in a nanocontact to an extended magnetic film can create spin waves that condense to form dissipative droplet solitons. Here we report an experimental study of the temperature dependence of the current and applied fie…
View article: Multiple magnetic droplet soliton modes
Multiple magnetic droplet soliton modes Open
Droplet solitons are large amplitude localized spin-wave excitations that can be created in magnetic thin films with uniaxial anisotropy by a spin-polarized current flowing through an electrical nanocontact. Here, we report a low-temperatu…
View article: Generation and stability of dynamical skyrmions and droplet solitons
Generation and stability of dynamical skyrmions and droplet solitons Open
A spin-polarized current in a nanocontact to a magnetic film can create collective magnetic oscillations by compensating the magnetic damping. In particular, in materials with uniaxial magnetic anisotropy, droplet solitons have been observ…
View article: Twinned-domain-induced magnonic modes in epitaxial LSMO/STO films
Twinned-domain-induced magnonic modes in epitaxial LSMO/STO films Open
The use of periodic magnetic structures to control the magneto-dynamic properties of materials-magnonics-is a rapidly developing field. In the last decade, a number of studies have. shown that metallic films can be patterned or combined in…
View article: Electric-Field-Adjustable Time-Dependent Magnetoelectric Response in Martensitic FeRh Alloy
Electric-Field-Adjustable Time-Dependent Magnetoelectric Response in Martensitic FeRh Alloy Open
Steady or dynamic magnetoelectric response, selectable and adjustable by only varying the amplitude of the applied electric field, is found in a multiferroic FeRh/PMN-PT device. In-operando time-dependent structural, ferroelectric, and mag…
View article: Simultaneous imaging of strain waves and induced magnetization dynamics at the nanometer scale
Simultaneous imaging of strain waves and induced magnetization dynamics at the nanometer scale Open
Changes in strain can be used to modify electronic and magnetic properties in crystal structures, to manipulate nanoparticles and cells, or to control chemical reactions. The magneto-elastic (ME) effect--the change of magnetic properties c…
View article: Simultaneous imaging of strain waves and induced magnetization dynamics at the nanometer scale
Simultaneous imaging of strain waves and induced magnetization dynamics at the nanometer scale Open
Changes in strain can be used to modify electronic and magnetic properties in crystal structures, to manipulate nanoparticles and cells, or to control chemical reactions. The magneto-elastic (ME) effect--the change of magnetic properties c…
View article: Describing synchronization and topological excitations in arrays of magnetic spin torque oscillators through the Kuramoto model
Describing synchronization and topological excitations in arrays of magnetic spin torque oscillators through the Kuramoto model Open
The collective dynamics in populations of magnetic spin torque oscillators (STO) is an intensely studied topic in modern magnetism. Here, we show that arrays of STO coupled via dipolar fields can be modeled using a variant of the Kuramoto …