Article
Physics, Multidisciplinary
N. S. Bingham, X. Zhang, J. Ramberger, O. Heinonen, C. Leighton, P. Schiffer
Summary: In this study, we investigated the temperature and magnetic field dependence of the total magnetic moment of large-area permalloy artificial square spin ice arrays. Our findings showed that the hysteresis behavior and temperature dependence are consistent with the Stoner-Wohlfarth model, with deviations observed at small lattice spacing due to interisland interactions. Through micromagnetic simulations, we further explored the complex magnetization reversal induced by interisland interactions, highlighting the critical role of island shapes in tuning the physical properties of artificial spin ice structures and other nanomagnet systems.
PHYSICAL REVIEW LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Susmita Saha, Jingyuan Zhou, Kevin Hofhuis, Attila Kakay, Valerio Scagnoli, Laura J. Heyderman, Sebastian Gliga
Summary: Artificial spin ices are periodic arrangements of nanomagnets with interacting properties that can be used to create functional materials such as magnonic crystals. Symmetry breaking plays a significant role in defining mode profiles, and the mode spectra exhibit signatures of long-range interactions in the system.
Article
Physics, Multidisciplinary
Francesco Caravelli, Gia-Wei Chern, Cristiano Nisoli
Summary: This article presents a proposal for an electrical memory reminiscent of a memristor in connected Kagome artificial spin ice and simulates two scenarios to observe the memory behavior.
NEW JOURNAL OF PHYSICS
(2022)
Article
Multidisciplinary Sciences
Gary W. Paterson, Gavin M. Macauley, Rair Macedo
Summary: The study found that a simple point dipole model works relatively well for square ice, but fails to replicate the properties observed in recent experiments with pinwheel ice. Parameterization of the reversal barrier in a Stoner-Wohlfarth model improves upon this, but does not fully capture the physics of ferromagnetic coupling observed in pinwheel structures.
ADVANCED THEORY AND SIMULATIONS
(2021)
Article
Physics, Multidisciplinary
M. Goryca, X. Zhang, J. Li, A. L. Balk, J. D. Watts, C. Leighton, C. Nisoli, P. Schiffer, S. A. Crooker
Summary: Artificial spin ices can host plasmalike regimes with high density of mobile magnetic monopoles, dynamics of which are most diffusive in the plasma regime. This provides a new paradigm for probing the physics of effective magnetic charges in synthetic matter, with on-demand monopole regimes having field-tunable densities and dynamic properties.
Article
Chemistry, Multidisciplinary
Sergi Lendinez, Mojtaba T. Kaffash, M. Benjamin Jungfleisch
Summary: In this study, the intricate interplay of magnetization dynamics of two dissimilar ferromagnetic metals in a square artificial spin ice (ASI) network was exploited to modulate spin-wave properties effectively. Unique spectra attributed to each sublattice were observed, with inter- and intralattice dynamics facilitated by distinct magnetization properties of the two materials. By combining materials with dissimilar magnetic properties, a wide range of two-dimensional structures were realized, potentially leading to new concepts in nanomagnonics.
Article
Physics, Multidisciplinary
Kevin Hofhuis, Sandra Helen Skjaervo, Sergii Parchenko, Hanu Arava, Zhaochu Luo, Armin Kleibert, Peter Michael Derlet, Laura Jane Heyderman
Summary: This study investigates the magnetic phase transitions in artificial kagome-lattice spin ice. By controlling the interactions between nanomagnets, the researchers successfully observe the theoretically predicted phase transitions. They change the global symmetry of the system to achieve the transition from high-temperature phase to low-temperature ordered phase and find that the driving force for spin and charge ordering depends on the degeneracy strength at the vertex.
Article
Physics, Applied
Rehana Begum Popy, Julia Frank, Robert L. Stamps
Summary: In this study, the possible magnetic behaviors of bilayer artificial spin ice are examined using numerical simulations. The impact of long-range dipolar coupling on magnetization dynamics is investigated by varying the layer separation and rotation. Unusual magnetic ordering is predicted for certain angles that define lateral spin superlattices in the bilayer systems.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Sourav Sahoo, Andrew May, Arjen van den Berg, Amrit Kumar Mondal, Sam Ladak, Anjan Barman
Summary: The study demonstrates a well-defined approach to explore high-frequency spin dynamics in complex 3D spintronic and magnonic structures by measuring spin waves within a 3D artificial spin ice structure.
Article
Chemistry, Multidisciplinary
Avinash Kumar Chaurasiya, Amrit Kumar Mondal, Jack C. Gartside, Kilian D. Stenning, Alex Vanstone, Saswati Barman, Will R. Branford, Anjan Barman
Summary: Artificial spin ice systems have attracted growing interest for their potential applications in reprogrammable memory, logic, and magnonics. Direct comparisons of different artificial spin ice systems are crucial for advancing the field, with studies on systems comprising continuously connected nanostructures and systems with disconnected nanobars revealing key insights into spin-wave dynamics and magnetic reversal.
Article
Physics, Multidisciplinary
Mojtaba Taghipour Kaffash, Sergi Lendinez, M. Benjamin Jungfleisch
Summary: Traditional electronics use charge currents for information transmission while spin waves are seen as a more efficient alternative. Nanomagnonics with artificial spin ice offer a wealth of possibilities for controlling dynamics.
Article
Physics, Applied
Kwan Hon, Yuki Kuwabiraki, Minori Goto, Ryoichi Nakatani, Yoshishige Suzuki, Hikaru Nomura
Summary: Using artificial spin ice (ASI) for reservoir computing can enhance short-term memory capacity and nonlinear computational capacity. The performance of the reservoir can be optimized by tuning the aspect ratios of the magnets.
APPLIED PHYSICS EXPRESS
(2021)
Article
Chemistry, Physical
Petai Pip, Artur Glavic, Sandra Helen Skjaervo, Anja Weber, Andrew Smerald, Kirill Zhernenkov, Naemi Leo, Frederic Mila, Laetitia Philippe, Laura J. Heyderman
Summary: In this study, grazing-incidence small-angle neutron scattering was used to experimentally quantify the spin-liquid-like correlations in highly-frustrated artificial spin systems. Using a newly-developed empirical structure-factor model, the short-range correlated spin-liquid state was accurately described and shown to be in good agreement with theoretical predictions.
NANOSCALE HORIZONS
(2021)
Article
Nanoscience & Nanotechnology
Mahathi Kuchibhotla, Arabinda Haldar, Adekunle Olusola Adeyeye
Summary: Artificial spin ice structures with different lattice symmetries (square, kagome, and triangle) exhibit reconfigurable microwave properties. The magnetization dynamics were investigated using ferromagnetic resonance spectroscopy. The results show distinct resonance modes in square spin ice structures, while kagome and triangular structures have well-separated modes localized at the center of individual nanomagnets. The orientation of nanomagnets with respect to the applied magnetic field leads to the merging and splitting of modes.
Editorial Material
Physics, Multidisciplinary
Susan Kempinger
Summary: Advancements in precision lithography and measurement have enabled the observation and control of magnetic phase transition in kagome artificial spin ice, potentially leading to the development of new technological devices.
Article
Physics, Multidisciplinary
Vineeth Mohanan Parakkat, Gavin M. Macauley, Robert L. Stamps, Kannan M. Krishnan
Summary: This research demonstrates the tunability of the ground state for a hybrid artificial spin ice made of Fe nanomagnets, with three distinct magnetic textures identified by varying site-specific exchange-bias fields: a striped ferromagnetic phase, an antiferromagnetic phase achievable through external field protocols, and an unconventional ground state with magnetically charged pairs embedded in an antiferromagnetic matrix. Monte Carlo simulations support the results of field protocols and show that pinning tunes relaxation timescales and critical behavior.
PHYSICAL REVIEW LETTERS
(2021)
Review
Physics, Condensed Matter
Anjan Barman, Gianluca Gubbiotti, S. Ladak, A. O. Adeyeye, M. Krawczyk, J. Grafe, C. Adelmann, S. Cotofana, A. Naeemi, V. Vasyuchka, B. Hillebrands, S. A. Nikitov, H. Yu, D. Grundler, A. Sadovnikov, A. A. Grachev, S. E. Sheshukova, J-Y Duquesne, M. Marangolo, G. Csaba, W. Porod, V. E. Demidov, S. Urazhdin, S. O. Demokritov, E. Albisetti, D. Petti, R. Bertacco, H. Schultheiss, V. V. Kruglyak, V. D. Poimanov, S. Sahoo, J. Sinha, H. Yang, M. Munzenburg, T. Moriyama, S. Mizukami, P. Landeros, R. A. Gallardo, G. Carlotti, J- Kim, R. L. Stamps, R. E. Camley, B. Rana, Y. Otani, W. Yu, T. Yu, G. E. W. Bauer, C. Back, G. S. Uhrig, O. Dobrovolskiy, B. Budinska, H. Qin, S. van Dijken, A. Chumak, A. Khitun, D. E. Nikonov, I. A. Young, B. W. Zingsem, M. Winklhofer
Summary: Magnonics is a burgeoning research field that focuses on utilizing spin waves to transmit, store, and process information, showing significant progress in the past decade. The key challenges include excitation of sub-100 nm wavelength magnons, manipulation on the nanoscale, and creation of sub-micrometre devices using low-Gilbert damping magnetic materials. Magnonics offers advantages such as lower energy consumption, easier integrability, compatibility with CMOS structure, reprogrammability, shorter wavelength, smaller device features, anisotropic properties, negative group velocity, non-reciprocity, and efficient tunability by various external stimuli.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Physics, Applied
Rair Macedo, Rory C. Holland, Paul G. Baity, Luke J. McLellan, Karen L. Livesey, Robert L. Stamps, Martin P. Weides, Dmytro A. Bozhko
Summary: The emerging field of cavity spintronics investigates the strong coupling between standing electromagnetic waves and spin waves, magnons, in microwave cavity resonators. Control of coupling strength is crucial for applications in areas such as quantum communication and dark matter detection, leading to intensive efforts to understand coupling mechanisms. The electromagnetic properties of resonators and magnetic samples are crucial for a comprehensive understanding of the coupling between these systems.
PHYSICAL REVIEW APPLIED
(2021)
Article
Physics, Applied
Rehana Begum Popy, Julia Frank, Robert L. Stamps
Summary: In this study, the possible magnetic behaviors of bilayer artificial spin ice are examined using numerical simulations. The impact of long-range dipolar coupling on magnetization dynamics is investigated by varying the layer separation and rotation. Unusual magnetic ordering is predicted for certain angles that define lateral spin superlattices in the bilayer systems.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Physics, Applied
J. Iyaro, R. L. Stamps
Summary: This paper examines excitations that may appear in cavity magnonics experiments using numerical micromagnetics and a recently developed semi-classical cavity magnonics theory. The theory, which is applicable to linear and nonlinear dynamic systems, is demonstrated through example applications for magnetic systems described by numerical micromagnetics. The effects of large amplitude driving and elliptically polarized driving fields are also studied. The main conclusion is that the theory, when combined with micromagnetics, offers a useful technique for describing cavity photon-magnon coupling for a wide range of linear and nonlinear magnetic dynamics.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Igor Proskurin, Jephthah O. Iyaro, Robert L. Stamps
Summary: This research demonstrates the realization of level attraction phenomenon in a Floquet system with memory and provides an example in cavity magnonics, showing that magnetic excitations in systems driven far from equilibrium may show level attraction with cavity photons.
Article
Materials Science, Multidisciplinary
Jephthah O. Iyaro, Igor Proskurin, Robert L. Stamps
Summary: The presence of DMI in antiferromagnetic optomagnonic systems enables spin interactions with cavity photons and modulates frequencies. This work provides a new approach to measure the DMI constant in optomagnonic experiments by comparing resonances obtained with different polarizations of the exciting field.
Article
Materials Science, Multidisciplinary
Igor Proskurin, Robert L. Stamps
Summary: The phenomenon of level attraction, where two modes coalesce in a region separated by exceptional points, is observed in certain systems. This behavior may apply to various systems such as optomechanical and optomagnonic systems.
Correction
Physics, Applied
Sandra H. Skjaervo, Christopher H. Marrows, Robert L. Stamps, Laura J. Heyderman
NATURE REVIEWS PHYSICS
(2020)
Review
Physics, Applied
Sandra H. Skjaervo, Christopher H. Marrows, Robert L. Stamps, Laura J. Heyderman
NATURE REVIEWS PHYSICS
(2020)
Article
Materials Science, Multidisciplinary
Gavin M. Macauley, Gary W. Paterson, Yue Li, Rair Macedo, Stephen McVitie, Robert L. Stamps
Article
Materials Science, Multidisciplinary
L. Desplat, C. Vogler, J. -V. Kim, R. L. Stamps, D. Suess
Article
Materials Science, Multidisciplinary
Gary W. Paterson, Gavin M. Macauley, Yue Li, Rair Macedo, Ciaran Ferguson, Sophie A. Morley, Mark C. Rosamond, Edmund H. Linfield, Christopher H. Marrows, Robert L. Stamps, Stephen McVitie
Article
Materials Science, Multidisciplinary
Benjamin W. Zingsem, Michael Farle, Robert L. Stamps, Robert E. Camley
Article
Materials Science, Multidisciplinary
L. Desplat, J- Kim, R. L. Stamps
