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View article: Observation of thermally activated coherent magnon-magnon coupling in a magnonic hybrid system
Observation of thermally activated coherent magnon-magnon coupling in a magnonic hybrid system Open
We experimentally demonstrate strong magnon-magnon coupling by thermal spin excitations in yttrium iron garnet/permalloy (YIG/Py) hybrid structures using microfocused Brillouin light scattering - an optical technique that enables the detec…
View article: Controlling polarization of spintronic THz emitter by remanent magnetization texture
Controlling polarization of spintronic THz emitter by remanent magnetization texture Open
Terahertz (THz) sciences and technologies have contributed to a rapid development of a wide range of applications and expanded the frontiers in fundamental science. Spintronic terahertz emitters offer conceptual advantages since the spin o…
View article: Controlling polarization of spintronic THz emitter by remanent magnetization texture
Controlling polarization of spintronic THz emitter by remanent magnetization texture Open
Terahertz (THz) sciences and technologies have contributed to a rapid development of a wide range of applications and expanded the frontiers in fundamental science. Spintronic terahertz emitters offer conceptual advantages since the spin o…
View article: Nonlinear multi-magnon scattering in artificial spin ice
Nonlinear multi-magnon scattering in artificial spin ice Open
Magnons, the quantum-mechanical fundamental excitations of magnetic solids, are bosons whose number does not need to be conserved in scattering processes. Microwave-induced parametric magnon processes, often called Suhl instabilities, have…
View article: Probing anisotropy in epitaxial Fe/Pt bilayers by spin–orbit torque ferromagnetic resonance
Probing anisotropy in epitaxial Fe/Pt bilayers by spin–orbit torque ferromagnetic resonance Open
We report the generation and detection of spin–orbit torque ferromagnetic resonance (STFMR) in micropatterned epitaxial Fe/Pt bilayers grown by molecular beam epitaxy. The magnetic field dependent measurements at an in-plane magnetic field…
View article: Tailoring ferromagnetic resonance in bicomponent artificial spin ices
Tailoring ferromagnetic resonance in bicomponent artificial spin ices Open
Magnonic crystals are artificial media in which magnetic properties such as saturation magnetization or relative permeability are periodically modulated in space, allowing for effective control of the magnonic bandstructure by geometrical …
View article: Observation of mode splitting in artificial spin ice: A comparative ferromagnetic resonance and Brillouin light scattering study
Observation of mode splitting in artificial spin ice: A comparative ferromagnetic resonance and Brillouin light scattering study Open
We report the dependence of the magnetization dynamics in a square artificial spin-ice lattice on the in-plane magnetic field angle. Using two complementary measurement techniques—broadband ferromagnetic resonance and micro-focused Brillou…
View article: Emergent Spin Dynamics Enabled by Lattice Interactions in a Bicomponent Artificial Spin Ice
Emergent Spin Dynamics Enabled by Lattice Interactions in a Bicomponent Artificial Spin Ice Open
Artificial spin ice (ASI) networks are arrays of nanoscaled magnets that can serve both as models for frustration in atomic spin ice as well as for exploring new spin-wave-based strategies to transmit, process, and store information. Here,…
View article: Temperature-dependent collective magnetization reversal in a network of ferromagnetic nanowires
Temperature-dependent collective magnetization reversal in a network of ferromagnetic nanowires Open
The collective behavior of geometrically frustrated magnetization in connected networks of ferromagnetic nanowires, known as artificial spin ice, leads to complex magnetotransport behavior in those structures. Here, we present temperature-…
View article: Modification of terahertz emission spectrum using microfabricated spintronic emitters
Modification of terahertz emission spectrum using microfabricated spintronic emitters Open
Terahertz (THz) radiation with sub-millimeter wavelength falls in the gap between optical and radio frequencies. Conventional THz emitters do not intertwine with spin degrees of freedom. However, it was recently shown that broadband THz ra…
View article: Control of spin dynamics in artificial honeycomb spin-ice-based nanodisks
Control of spin dynamics in artificial honeycomb spin-ice-based nanodisks Open
In this paper, we report the experimental and theoretical characterization of the angular-dependent spin dynamics in arrays of ferromagnetic nanodisks arranged on a honeycomb lattice. The magnetic field and microwave frequency dependence, …
View article: Strong Coupling between Magnons and Microwave Photons in On-Chip Ferromagnet-Superconductor Thin-Film Devices
Strong Coupling between Magnons and Microwave Photons in On-Chip Ferromagnet-Superconductor Thin-Film Devices Open
We demonstrate strong magnon-photon coupling of a thin-film Permalloy device fabricated on a coplanar superconducting resonator. A coupling strength of 0.152 GHz and a cooperativity of 68 are found for a 30-nm-thick Permalloy stripe. The c…
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: Thermal Behavior of a Single Magnetic Vortex Studied with Magnetotransport
Thermal Behavior of a Single Magnetic Vortex Studied with Magnetotransport Open
Spin textures such as skyrmions and magnetic vortices are good candidates for a variety of applications, such as magnetic memories, oscillators and neuromorphic computing. Understanding the magnetic process of these systems is important, a…
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: Gyrotropic frequency control in ferromagnetic dots using a nanoscale vortex barrier
Gyrotropic frequency control in ferromagnetic dots using a nanoscale vortex barrier Open
The vortex translational mode frequency is known to be only weakly dependent on the magnitude of an in-plane magnetic field (e.g. the vortex core position) for circular ferromagnetic dots. Here we demonstrated that the frequency-field depe…
View article: Spin Vortex Resonance in Non-planar Ferromagnetic Dots
Spin Vortex Resonance in Non-planar Ferromagnetic Dots Open
In planar structures, the vortex resonance frequency changes little as a function of an in-plane magnetic field as long as the vortex state persists. Altering the topography of the element leads to a vastly different dynamic response that …
View article: Observation of droplet soliton drift resonances in a spin-transfer-torque nanocontact to a ferromagnetic thin film
Observation of droplet soliton drift resonances in a spin-transfer-torque nanocontact to a ferromagnetic thin film Open
Magnetic droplet solitons are non-linear dynamical modes that can be excited\nin a thin film with perpendicular magnetic anisotropy with a\nspin-transfer-torque. Although droplet solitons have been proved to be stable\nwith a hysteretic re…
View article: Fabrication of large dual-polarized multichroic TES bolometer arrays for CMB measurements with the SPT-3G camera
Fabrication of large dual-polarized multichroic TES bolometer arrays for CMB measurements with the SPT-3G camera Open
This work presents the procedures used at Argonne National Laboratory to fabricate large arrays of multichroic transition-edge sensor (TES) bolometers for cosmic microwave background (CMB) measurements. These detectors will be assembled in…
View article: Dynamic control of metastable remanent states in mesoscale magnetic elements
Dynamic control of metastable remanent states in mesoscale magnetic elements Open
The formation of the vortex-antivortex-vortex (v-av-v) metastable remanent states in elongated magnetic elements have been systematically investigated using micromagnetic modeling. It is demonstrated that the v-av-v magnetization pattern c…