721 citations · 3.5k across the 59 of their papers we have counts for
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Magnetic field driven dynamics in twisted bilayer artificial spin ice at superlattice angles
Rehana Begum Popy, Julia Frank, Robert L. Stamps
Geometrical designs of interacting nanomagnets have been studied extensively in the form of two dimensional arrays called artificial spin ice. These systems are usually designed to…
Mode attraction in Floquet systems with memory: application to magnonics
Igor Proskurin, Jephthah Iyaro, Robert L. Stamps
Level attraction is a type of mode hybridization in open systems where instead of forming a hybridization gap, the energy spectrum of two modes coalesce in a region bounded by exce…
Level attraction and exceptional points in a resonant spin-orbit torque system
Igor Proskurin, Robert L. Stamps
Level attraction can appear in driven systems where instead of repulsion two modes coalesce in a region separated by two exceptional points. This behavior was proposed for optomech…
An Electromagnetic Approach to Cavity Spintronics
Rair Macêdo, Rory C. Holland, Paul G. Baity +5
The fields of cavity quantum electrodynamics and magnetism have recently merged into \textit{`cavity spintronics'}, investigating a quasiparticle that emerges from the strong coupl…
Symmetry Approach to Chiral Optomagnonics in Antiferromagnetic Insulators
Igor Proskurin, Robert L. Stamps
We discuss several aspects of chiral optomagnonics in antiferromagnetic insulators by considering common symmetries between the electromagnetic field and spin excitations. This app…
Ice-rule made manifold: phase transitions, topological defects and manifold restoration in two-dimensional artificial spin systems
Gavin M. Macauley, Gary W. Paterson, Yue Li +3
Artificial spin ices are arrays of correlated nano-scale magnetic islands that prove an excellent playground in which to study the role of topology in critical phenomena. Here, we…
Heisenberg pseudo-exchange and emergent anisotropies in field-driven pinwheel artificial spin ice
Gary W. Paterson, Gavin M. Macauley, Yue Li +8
Rotating all islands in square artificial spin ice (ASI) uniformly about their centres gives rise to the recently reported pinwheel ASI. At angles around 45, the antif…
Path sampling for lifetimes of metastable magnetic skyrmions and direct comparison with Kramers' method
L. Desplat, C. Vogler, J. -V. Kim +2
We perform a direct comparison between Kramers' method in many dimensions -- i.e., Langer's theory -- adapted to magnetic spin systems, and a path sampling method in the form of fo…
Microscopic origin of level attraction for a coupled magnon-photon system in a microwave cavity
Igor Proskurin, Rair Macêdo, Robert L. Stamps
We discuss various microscopic mechanisms for level attraction in a hybridized magnon-photon system of a ferromagnet in a microwave cavity. The discussion is based upon the electro…
Level Attraction Due to Dissipative Magnon-Photon Coupling
M. Harder, Y. Yang, B. M. Yao +5
We report dissipative magnon-photon coupling caused by cavity Lenz effect, where the magnons in a magnet induce a rf current in the cavity, leading to a cavity back action that imp…
Cavity Optomechanics of Topological Spin Textures in Magnetic Insulators
Igor Proskurin, Alexander S. Ovchinnikov, Jun-ichiro Kishine +1
Collective dynamics of topological magnetic textures can be thought of as a massive particle moving in a magnetic pinning potential. We demonstrate that inside a cavity resonator t…
Excitation of magnon spin photocurrents in antiferromagnetic insulators
Igor Proskurin, Alexander S. Ovchinnikov, Jun-ichiro Kishine +1
In the circular photogalvanic effect, circularly polarized light can produce a direct electron photocurrent in metals and the direction of the current depends on the polarization.…
Thermal stability of metastable magnetic skyrmions: Entropic narrowing and significance of internal eigenmodes
L. Desplat, D. Suess, J-V. Kim +1
We compute annihilation rates of metastable magnetic skyrmions using a form of Langer's theory in the intermediate-to-high damping (IHD) regime. For a Néel skyrmion, a Bloch skyrmi…
Spin-wave chirality and its manifestations in antiferromagnets
Igor Proskurin, Robert L. Stamps, Alexander S. Ovchinnikov +1
As first demonstrated by Tang and Cohen in chiral optics, the asymmetry in the rate of electromagnetic energy absorption between left and right enantiomers is determined by an opti…
Proposal of a micromagnetic standard problem for ferromagnetic resonance simulations
Alexander Baker, Marijan Beg, Gregory Ashton +10
Nowadays, micromagnetic simulations are a common tool for studying a wide range of different magnetic phenomena, including the ferromagnetic resonance. A technique for evaluating r…
Reconfigurable spin wave band structure of artificial square spin ice
Ezio Iacocca, Sebastian Gliga, Robert L. Stamps +1
Artificial square spin ices are structures composed of magnetic elements arranged on a geometrically frustrated lattice and located on the sites of a two-dimensional square lattice…
Spatially periodic domain wall pinning potentials: Asymmetric pinning and dipolar biasing
P. J. Metaxas, P. -J. Zermatten, R. L. Novak +9
Domain wall propagation has been measured in continuous, weakly disordered, quasi-two-dimensional, Ising-like magnetic layers that are subject to spatially periodic domain wall pin…
Interfacial coupling across a modified interface studied with ferromagnetic resonance
R. Magaraggia, S. McIntyre, K. Kennewell +5
Using spin waves we directly probe the interface of an exchange biased NiFe/IrMn film which has been modified by the presence of an Au dusting layer. Co…
Disorder strength and field-driven ground state domain formation in artificial spin ice: experiment, simulation and theory
Zoe Budrikis, J. P. Morgan, J. Akerman +5
Quenched disorder affects how non-equilibrium systems respond to driving. In the context of artificial spin ice, an athermal system comprised of geometrically frustrated classical…
Effect of disorder studied with ferromagnetic resonance for arrays of tangentially magnetized sub-micron Permalloy discs fabricated by nanosphere lithography
Nils Ross, Mikhail Kostylev, Robert L. Stamps
Tangentially magnetized trigonal arrays of sub-micron Permalloy discs are characterized with ferromagnetic resonance to determine the possible contributions to frequency and linewi…
Spin-wave propagation in a microstructured magnonic crystal
A. V. Chumak, P. Pirro, A. A. Serga +8
Transmission of microwave spin waves through a microstructured magnonic crystal in the form of a permalloy waveguide of a periodically varying width was studied experimentally and…
Electron Transport through Disordered Domain Walls: Coherent and Incoherent Regimes
Peter E. Falloon, Rodolfo A. Jalabert, Dietmar Weinmann +1
We study electron transport through a domain wall in a ferromagnetic nanowire subject to spin-dependent scattering. A scattering matrix formalism is developed to address both coher…
A Circuit Model for Domain Walls in Ferromagnetic Nanowires: Application to Conductance and Spin Transfer Torques
Peter E. Falloon, Rodolfo A. Jalabert, Dietmar Weinmann +1
We present a circuit model to describe the electron transport through a domain wall in a ferromagnetic nanowire. The domain wall is treated as a coherent 4-terminal device with inc…
Electronic transport through domain walls in ferromagnetic nanowires: Co-existence of adiabatic and non-adiabatic spin dynamics
Victor A. Gopar, Dietmar Weinmann, Rodolfo A. Jalabert +1
We study the effect of a domain wall on the electronic transport in ferromagnetic quantum wires. Due to the transverse confinement, conduction channels arise. In the presence of a…