128 citations · 919 across the 50 of their papers we have counts for
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Long-Range Magnetic Order in Structurally Embedded Mesospin Metamaterials
Christina Vantaraki, Oier Bikondoa, Matías P. Grassi +11
Engineered assemblies of interacting magnetic elements-magnetic metamaterials-provide a powerful route to tailor collective magnetic order and dynamics. By structuring matter at th…
Exponential Dependence of Interlayer Exchange Coupling in Fe/MgO(001) Superlattices on Temperature
Nanny Strandqvist, Tobias Warnatz, Kristbjörg Anna Thórarinsdóttir +3
The interlayer exchange coupling in Fe/MgO(001) superlattices is found to increase exponentially with decreasing temperature. Around 150~K, the field induced response changes from…
Magnetic texture control in ion-implanted metamaterials
Christina Vantaraki, Kristina Ignatova, Dmitrii Moldarev +5
We study experimentally the impact of the additive fabrication method on the magnetic properties of Fe-implanted Pd square artificial spin ice lattices. Our findings show that…
Magnetic Order and Long-Range Interactions in Mesoscopic Ising Chains
Christina Vantaraki, Matías P. Grassi, Kristina Ignatova +4
We investigate the design of magnetic ordering in one-dimensional mesoscopic magnetic Ising chains by modulating long-range interactions. These interactions are affected by geometr…
Modelling nanomagnet vertex dynamics through Coulomb charges
Samuel D. Slöetjes, Matías P. Grassi, Vassilios Kapaklis
We investigate the magnetization dynamics in nanomagnet vertices often found in artificial spin ices. Our analysis involves creating a simplified model that depicts edge magnetizat…
Polymerization in magnetic metamaterials
Samuel D. Slöetjes, Matías P. Grassi, Vassilios Kapaklis
We numerically study a mesoscopic system consisting of magnetic nanorings in the presence of thermal magnetization fluctuations. We find the formation of dipolar-field-mediated ``b…
Texture fluctuations and emergent dynamics in coupled nanomagnets
Samuel D. Slöetjes, Björgvin Hjörvarsson, Vassilios Kapaklis
We analyse the thermal fluctuations of magnetization textures in two stray field coupled elements, forming mesospins. To this end, the energy landscape associated with the thermal…
Emergent anisotropy in magnetic metamaterials
Nanny Strandqvist, Björn Erik Skovdal, Merlin Pohlit +3
We demonstrate directional dependence of the self-modification of internal mesospin textures in magnetic metamaterials, arising from the coupling of the atomic- and mesoscopic leng…
Thermal excitations within and among mesospins in artificial spin ice
Björn Erik Skovdal, Samuel D. Slöetjes, Merlin Pohlit +3
We provide experimental and numerical evidence for thermal excitations within and among magnetic mesospins, forming artificial spin ice structures. At low temperatures, a decrease…
Multiple energy-scales in vertex-frustrated mesospin systems
Henry Stopfel, Unnar B. Arnalds, Aaron Stein +3
The interplay between topology and energy-hierarchy plays a vital role in the collective magnetic order in artificial ferroic systems. Here we investigate, experimentally, the effe…
Temperature induced collapse of spin dimensionality in magnetic metamaterials
Björn Erik Skovdal, Nanny Strandqvist, Henry Stopfel +5
Spin and spatial dimensionalities are universal concepts, essential for describing both phase transitions and dynamics in magnetic materials. Lately, these ideas have been adopted…
The effect of confinement on thermally induced fluctuations in nanomagnets
Samuel D. Slöetjes, Björgvin Hjörvarsson, Vassilios Kapaklis
We study the magnetization dynamics in nanomagnets excited by stochastic magnetic fields to mimic temperature in a micromagnetic framework. The effect of confinement arising from t…
Collective magnetic dynamics in artificial spin ice probed by AC susceptibility
Merlin Pohlit, Giuseppe Muscas, Ioan-Augustin Chioar +8
We report on the study of the thermal dynamics of square artificial spin ice, probed by means of temperature and frequency dependent AC susceptibility. Pronounced influence of the…
Coherent charge and magnetic ordering in Ho/Y superlattice revealed by element-selective x-ray scattering
V. Ukleev, V. Tarnavich, E. Tartakovskaya +7
Magnetic rare-earth / non-magnetic metal superlattices are well-known to display chiral spin helices in the rare-earth layers that propagate coherently across the non-magnetic laye…
Observation of the nonlinear Wood's anomaly on periodic arrays of nickel nanodimers
Ngoc-Minh Tran, Ioan-Augustin Chioar, Aaron Stein +6
Linear and nonlinear magneto-photonic properties of periodic arrays of nickel nanodimers are governed by the interplay of the (local) optical response of individual nanoparticles a…
The importance of the weak: Interaction modifiers in artificial spin ices
Erik Östman, Henry Stopfel, Ioan-Augustin Chioar +4
The modification of geometry and interactions in two-dimensional magnetic nanosystems has enabled a range of studies addressing the magnetic order, collective low-energy dynamics,…
Thickness dependent enhancement of the polar magneto-optic Kerr effect in Co magnetoplasmonic nanostructures
Richard M. Rowan-Robinson, Emil Melander, Ioan-Augustin Chioar +4
Large surface plasmon polariton assisted enhancement of the magneto-optical activity has been observed in the past, through spectral measurements of the polar Kerr rotation in Co h…
Thermally induced magnetic relaxation in square artificial spin ice
M. S. Andersson, S. D. Pappas, H. Stopfel +6
The properties of natural and artificial assemblies of interacting elements, ranging from Quarks to Galaxies, are at the heart of Physics. The collective response and dynamics of s…
A new look on the two-dimensional Ising model: thermal artificial spins
Unnar B. Arnalds, Jonathan Chico, Henry Stopfel +7
We present a direct experimental investigation of the thermal ordering in an artificial analogue of an asymmetric two dimensional Ising system composed of a rectangular array of na…
Light localisation and magneto-optic enhancement in Ni anti-dot arrays
Markus Rollinger, Philip Thielen, Emil Melander +6
The excitation of surface plasmons in magnetic nano-structures can strongly influence their magneto-optical properties. Here, we use photoemission electron microscopy to map the sp…
Melting artificial spin ice
Vassilios Kapaklis, Unnar B. Arnalds, Adam Harman-Clarke +7
Artificial spin ice arrays of micromagnetic islands are a means of engineering additional energy scales and frustration into magnetic materials. Despite much progress in elucidatin…
Magnetooptic enhancement and magnetic properties in Fe antidot films with hexagonal symmetry
E. Th. Papaioannou, V. Kapaklis, P. Patoka +5
The magnetooptic and magnetic properties of hexagonal arrays of holes in optically thin iron films are presented. We analyze their dependence on the hole radius and compare the res…