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
Materials Science, Multidisciplinary
Arindam Samanta, Gianluca Gubbiotti, Saibal Roy
Summary: The study investigates the magnetic properties of exchange spring nanoheterostructured CoP films prepared by electrodeposition at room temperature. Static magnetic measurement reveals different hysteresis loop structures, and the first-order reversal curve distributions confirm the nature of the films. Field-dependent Brillouin light scattering spectra unveil different spin wave modes in the films. The study demonstrates the evolution of the exchange spring structure and the enhanced strength of the exchange coupling in the developed film.
Article
Chemistry, Physical
Jonathan Pelliciari, Sangjae Lee, Keith Gilmore, Jiemin Li, Yanhong Gu, Andi Barbour, Ignace Jarrige, Charles H. Ahn, Frederick J. Walker, Valentina Bisogni
Summary: Resonant inelastic X-ray scattering was used to investigate the spectrum of spin excitations in mesoscopic Fe films, revealing that as the thickness is reduced, ferromagnetic spin excitations in the films renormalize to lower energies along the out-of-plane direction while maintaining their dispersion in the in-plane direction. This thickness dependence was explained by Heisenberg model calculations considering the confinement in the out-of-plane direction caused by the loss of Fe bonds.
Article
Physics, Applied
S. Tacchi, F. Casoli, M. G. Pini, A. Rettori, M. Madami, J. Akerman, T. T. Le, Q. N. Pham, H. L. Pham, T. N. Anh Nguyen
Summary: Utilizing alternating gradient force magnetometry and Brillouin light scattering experiments, this study investigated perpendicular magnetic anisotropy localized at the CoFeB-MgO interface in different heterostructures. Thermal treatment was found to significantly increase the PMA, and analysis of spin wave frequencies allowed estimation of the thickness dependence of PMA in a single CoFeB film. Additionally, the study of magnetic tunnel junctions revealed an antiferromagnetic interlayer exchange coupling between CoFeB layers that increased after annealing.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Nanoscience & Nanotechnology
Hugo Merbouche, Martin Collet, Michael Evelt, Vladislav E. Demidov, Jose Luis Prieto, Manuel Munoz, Jamal Ben Youssef, Gregoire de Loubens, Olivier Klein, Stephane Xavier, Olivier D'Allivy Kelly, Paolo Bortolotti, Vincent Cros, Abdelmadjid Anane, Sergej O. Demokritov
Summary: Magnonics rely on the wave nature of magnetic excitations to process information at frequencies between a few GHz to tens of GHz, suitable for operation in radio-frequency bands for 4G and 5G telecommunications. A micron-scale magnonic crystal was used to demonstrate radio-frequency signal filtering with a frequency selectivity of 20 MHz at an operating frequency of 4.9 GHz, providing insight into the physics of SW propagation in periodically modulated nanoscale structures.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Physical
Simin Pang, Yaru Xie, Chao Shen, Jun Zhang
Summary: Study on the effects of magnetic field and temperature on the frequency, line width, and intensity of magnons in yttrium iron garnet (YIG) using Brillouin light scattering (BLS) spectroscopy. The applied magnetic field can effectively change the magnon frequency while maintaining its lifetime. The temperature dependence of magnon frequency and the linear relationship between magneto-optic effects and temperature can serve as a temperature sensor.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Nan Tang, W. L. N. C. Liyanage, Sergio A. Montoya, Sheena Patel, Lizabeth J. Quigley, Alexander J. Grutter, Michael R. Fitzsimmons, Sunil Sinha, Julie A. Borchers, Eric E. Fullerton, Lisa DeBeer-Schmitt, Dustin A. Gilbert
Summary: Magnetic skyrmions exhibit unique behaviors arising from their topological protection, including well-defined, 3D dynamic modes at microwave frequencies. Spin waves ejected into the interstitial regions between skyrmions create a magnetic turbulent sea. However, spin-wave interference can result in ordered structures due to the well-defined length scale and ordered lattice. This study captures the dynamics in hybrid skyrmions using small-angle neutron scattering and identifies a dynamic spin-wave fractal structure.
ADVANCED MATERIALS
(2023)
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
Physics, Applied
Yune-Seok Nam, Dae-Yun Kim, Yong-Keun Park, Ji-Sung Yu, Seong-Hyub Lee, Duck-Ho Kim, Byoung-Chul Min, Sug-Bong Choe
Summary: Here, researchers propose an experimental scheme to determine the strength of the Heisenberg exchange interaction in ultrathin magnetic films. The scheme analyzes the chirality transition between different types of domain walls under an in-plane magnetic field and estimates the exchange stiffness constant based on this analysis. The scheme, which utilizes the magneto-optical Kerr effect, is applicable to ultrathin magnetic films down to a few atomic layers.
APPLIED PHYSICS LETTERS
(2022)
Article
Optics
Moshe Katzman, Dvir Munk, Maayan Priel, Etai Grunwald, Mirit Hen, Naor Inbar, Moshe Feldberg, Tali Sharabani, Roy Zektzer, Gil Bashan, Menachem Vofsi, Uriel Levy, Avi Zadok
Summary: This work presents the research on discrete-time integrated microwave photon filters on standard silicon, achieving long delays through surface acoustic waves and information recovery in the optical domain. These filters have high freedom in design and are immune to environmental phase drifts.
Article
Chemistry, Multidisciplinary
Nandan K. P. Babu, Aleksandra Trzaskowska, Piotr Graczyk, Grzegorz Centala, Szymon Mieszczak, Hubert Glowinski, Milosz Zdunek, Slawomir Mielcarek, Jaroslaw W. Klos
Summary: The interaction between different types of wave excitation in hybrid systems is usually anisotropic. The magnetoelastic coupling between surface acoustic waves and spin waves strongly depends on the direction of the external magnetic field. However, this study shows that even if the field orientation supports the coupling, the magnetoelastic interaction may be significantly reduced for surface acoustic waves with a specific profile in the direction normal to the surface at distances much smaller than the wavelength.
Article
Chemistry, Multidisciplinary
Igor Yanilkin, Amir Gumarov, Igor Golovchanskiy, Bulat Gabbasov, Roman Yusupov, Lenar Tagirov
Summary: Experimental and theoretical studies were conducted on standing spin waves in epitaxial films of the ferromagnetic Pd1-xFex alloy with different distributions of the magnetic properties. The influence of the magnetic profile on the spin wave resonances was demonstrated, and the potential application of engineering standing spin waves in graded ferromagnetic films was discussed.
Article
Materials Science, Multidisciplinary
Charles Weiss, Matias Grassi, Yves Roussigne, Andrey Stashkevich, Thomas Schefer, Jerome Robert, Matthieu Bailleul, Mikhail Kostylev
Summary: We present the results of measuring propagating spin-wave spectroscopy on coplanar nano-antenna devices made of a Si/SiO2/Ru(5 nm)/Co(20)/Pt(5 nm) film. The measurements were analyzed using newly developed theoretical modeling and de-embedding procedures. Magnetic parameters of the film were determined through complementary Brillouin light scattering and ferromagnetic resonance measurements. The propagating spin wave signals were quantitatively accounted for in the investigated range of external magnetic fields (130-1500 Oe).
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Physics, Applied
Pawel Gruszecki, Igor L. Lyubchanskii, Konstantin Y. Guslienko, Maciej Krawczyk
Summary: The excitation of high-frequency short-wavelength spin waves using the non-linear nature of magnetization dynamics was proposed in this study, demonstrating efficient excitation of plane spin waves with doubled temporal and spatial frequencies. This method shows promise for integration with an inductive or point-like spin-torque source.
APPLIED PHYSICS LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Krzysztof Szulc, Simon Mendisch, Michal Mruczkiewicz, Francesca Casoli, Markus Becherer, Gianluca Gubbiotti
Summary: The study delves into the spin-wave dynamics in single and double ferromagnetic layer systems, revealing the crucial role of layer deposition order on magnetic parameters, with significant differences in the magnetic anisotropy constant leading to distinct dispersion relations for spin-wave modes.
Article
Materials Science, Multidisciplinary
A. Sadovnikov, G. Talmelli, G. Gubbiotti, E. N. Beginin, S. Sheshukova, S. A. Nikitov, C. Adelmann, F. Ciubotaru
Summary: The dependence of spin-wave excitation spectra on magnetic applied field in CoFeB meander-shaped films was experimentally studied through broadband ferromagnetic resonance measurements. Two different orientations of the external magnetic field were explored, with the vertical segments coupling the horizontal sections of the structure to support multiple magnetic modes.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Review
Physics, Applied
Jilei Chen, Haiming Yu, Gianluca Gubbiotti
Summary: This article discusses the application of unidirectional spin waves in next-generation logic devices, covering methods for emitting and measuring unidirectional spin waves, as well as magnonic logic devices based on such waves.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Engineering, Electrical & Electronic
Mattia Bassotti, Raffaele Silvani, Giovanni Carlotti
Summary: This paper investigates the dynamical properties of Neel skyrmions and analyzes their behavior in different frequency ranges. By calculating the magnonic band structure of magnonic crystals, it is possible to tune the permitted and forbidden frequency intervals.
IEEE MAGNETICS LETTERS
(2022)
Article
Physics, Applied
G. Gubbiotti, A. Sadovnikov, S. E. Sheshukova, E. Beginin, S. Nikitov, G. Talmelli, C. Adelmann, F. Ciubotaru
Summary: Studying the propagation of spin waves in 3D periodic structures has opened up new possibilities for connecting functional units in the magnonic circuitry. In this work, the researchers investigated the dependence of the magnonic band structure on the Ta spacer thickness in CoFeB/Ta/NiFe meander-shaped bilayers. Both propagating and stationary spin wave modes were observed. The frequency of the dispersive mode was found to slightly depend on the Ta spacer thickness, while the frequency position of the three stationary modes significantly increased with increasing Ta thickness. Micromagnetic calculations revealed that the stationary modes consisted of doublets with increasing frequency separation.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Nanoscience & Nanotechnology
R. Negrello, F. Montoncello, M. T. Kaffash, M. B. Jungfleisch, G. Gubbiotti
Summary: This study presents a combined experimental and numerical investigation of the spin-wave dispersion in a NiFe artificial spin-ice (ASI) system. The spin-wave dispersion exhibits a rich variety of modes with either stationary or propagating characteristics. The lowest frequency mode displays a bandwidth of approximately 0.5 GHz, which is independent of the presence of the underlying film. However, the intensity of certain modes in Brillouin light scattering strongly depends on the presence of the extended thin-film underlayer. Micromagnetic simulations reveal the dynamic coupling between the ASI lattice and film underlayer, and demonstrate the modulation of propagating spin waves at the nanometer length scale.
Article
Physics, Applied
M. Quintana, A. Melendez, C. Martin Valderrama, L. Fallarino, A. Berger
Summary: We have developed nanoscale-designed ferromagnetic thin films that can maintain constant coercivities over a wide temperature range, which is achieved by utilizing a graded exchange-coupling profile and a temperature-dependent exchange bias field mediated by a paramagnetic interlayer.
PHYSICAL REVIEW APPLIED
(2022)
Article
Chemistry, Multidisciplinary
Sho Watanabe, Vinayak S. Bhat, Andrea Mucchietto, Elif N. Dayi, Shixuan Shan, Dirk Grundler
Summary: Researchers investigate magnons with wavelengths down to 50 nm in ferrimagnetic Y3Fe5O12 beneath 2D lattices and achieve magnon interferometry with high extinction ratios of up to 26 dB over macroscopic distances of 350 wavelengths. These findings are important for the realization of complex neuronal networks.
ADVANCED MATERIALS
(2023)
Article
Physics, Applied
F. Montoncello, M. T. Kaffash, H. Carfagno, M. F. Doty, G. Gubbiotti, M. B. Jungfleisch
Summary: We investigated the magnetic-field-dependent spin-wave spectra in a hybrid structure consisting of NiFe artificial spin-ice (ASI) systems through combined Brillouin light scattering and micromagnetic simulation. The spectra showed several spin-wave modes with varying frequency and intensity under the applied magnetic field. Micromagnetic simulations helped identify these modes and extract information about the dynamic coupling, offering implications for the development of future three-dimensional magnonic applications and devices.
JOURNAL OF APPLIED PHYSICS
(2023)
Editorial Material
Physics, Applied
B. Flebus, S. M. Rezende, D. Grundler, A. Barman
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Multidisciplinary Sciences
Korbinian Baumgaertl, Dirk Grundler
Summary: Spin wave based computing offers advantages of low power consumption and absence of joule heating, but the lack of a direct method for storing spin wave information is a challenge. The authors demonstrate the reversal of nanomagnets using spin waves with small power requirements.
NATURE COMMUNICATIONS
(2023)
Review
Chemistry, Physical
Begona Acebedo, Maria C. Morant-Minana, Elena Gonzalo, Idoia Ruiz de Larramendi, Aitor Villaverde, Jokin Rikarte, Lorenzo Fallarino
Summary: Lithium metal batteries (LMBs) are a promising energy storage technology that can overcome the limitations of current Li-ion batteries. Their low density, low reduction potential, and high theoretical capacities can greatly improve the energy densities of the batteries. However, the efficiency at high current densities and the continuous degradation of LMBs are still challenges, which are related to the properties of the lithium metal anode (LMA). Therefore, the production and processing of LMAs are crucial to obtain the desired properties for LMBs.
ADVANCED ENERGY MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Maria Carmen Giordano, Mohammad Hamdi, Andrea Mucchietto, Dirk Grundler
Summary: We conducted experimental studies on spin-wave excitations in individual 22-nm-thick Ni80Fe20 nanotubes with diameters of about 150 nm. Using Brillouin light-scattering spectroscopy under microwave irradiation, we observed discrete resonances ranging from 2.5 to 12.5 GHz in the center of the nanotubes. Comparisons with theoretical work and micromagnetic simulations revealed different characteristic eigenmodes depending on the axial, mixed, or vortex configuration. The identification of helical phase profiles in the mixed and vortex states suggests the presence of nonreciprocal spin waves in confined modes. Our findings offer valuable insights into tubular spin-wave nanocavities and magnetochiral effects in three-dimensional nanomagnonics.
PHYSICAL REVIEW MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Huixin Guo, Axel J. M. Deenen, Mingran Xu, Mohammad Hamdi, Dirk Grundler
Summary: High-density integration in information technology has spurred research on functional 3D nanodevices. In this study, an additive manufacturing methodology was employed to fabricate unprecedented 3D ferromagnetic nanonetworks with a woodpile-structure unit cell. The collective spin dynamics at frequencies up to 25 GHz were investigated, revealing a significant discrepancy of about 10 GHz between bulk and surface modes due to different unit cell sizes in the Ni-based nanonetworks. The angle- and spatially-dependent modes demonstrate opportunities for multi-frequency signal processing in 3D circuits via magnons.
ADVANCED MATERIALS
(2023)
Article
Physics, Multidisciplinary
Vinayak Shantaram Bhat, Sho Watanabe, Florian Kronast, Korbinian Baumgaertl, Dirk Grundler
Summary: The study finds that artificial ferromagnetic quasicrystals with aperiodicity and unconventional rotational symmetries exhibit unusual physical and functional properties. By conducting spin-wave spectroscopy and X-ray photoemission electron microscopy, it is revealed that exchange-coupled quasicrystals show non-stochastic switching and collective phenomena, while both exchange and dipolarly coupled quasicrystals display magnonic excitations with narrow linewidths. These findings have practical implications for reconfigurable functionalities in spintronics and magnonics.
COMMUNICATIONS PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Lorenzo Fallarino, Uzair Naveed Chishti, Arianna Pesce, Grazia Accardo, Amna Rafique, Montserrat Casas-Cabanas, Pedro Lopez-Aranguren
Summary: This study demonstrates the feasibility of designing nanoscale bilayers to enable the efficient cycling of lithium-free solid-state batteries, by effectively controlling Li deposition on LLZO without the need for extra external pressure.
CHEMICAL COMMUNICATIONS
(2023)
