Article
Engineering, Electrical & Electronic
Hadrian Renaldo O. Aquino, David Connelly, Alexei Orlov, Jonathan Chisum, Gary H. Bernstein, Wolfgang Porod
Summary: This study demonstrates that using coplanar waveguides (CPWs) in magnetic thin films can enhance the frequency response for spin wave computing devices. However, this comes at the expense of peak transducer efficiency. It was also found that CPWs with etched gaps on the top of the film can serve as more efficient transducers for shorter decay lengths.
IEEE TRANSACTIONS ON MAGNETICS
(2022)
Article
Chemistry, Multidisciplinary
Zhenghua Li, Bin Dong, Yangyang He, Aiying Chen, Xiang Li, Jing-Hua Tian, Chenglin Yan
Summary: Researchers have successfully realized a higher-order vortex network through a designed nanostructure and demonstrated its potential as a waveguide for spin waves. The experiment showed that spin waves can propagate into the network through nanochannels formed by Bloch-Neel-type domain walls, with a propagation decay length of several micrometers, paving the way for the development of low-energy, reprogrammable, and miniaturized magnonic devices.
Article
Chemistry, Multidisciplinary
Xiaoye Chen, Ming Lin, Jian Feng Kong, Hui Ru Tan, Anthony K. C. Tan, Soong-Geun Je, Hang Khume Tan, Khoong Hong Khoo, Mi-Young Im, Anjan Soumyanarayanan
Summary: This study unveils the evolution of chiral spin texture characteristics on a tunable multilayer platform using electron and X-ray microscopies as well as numerical simulations. It establishes a comprehensive microscopic framework for investigating and tailoring chiral spin texture character in multilayer films.
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
Materials Science, Multidisciplinary
Y. Shimamoto, F. J. T. Goncalves, T. Sogo, Y. Kousaka, Y. Togawa
Summary: The study found that the characteristics of microwave propagation can be significantly influenced by adjusting the number of chiral solitons and the direction of the magnetic field in the CSL phase, opening up a new avenue for controlling microwave propagation characteristics using noncollinear spin textures.
Article
Chemistry, Multidisciplinary
Kirill O. Nikolaev, Stephanie R. Lake, Georg Schmidt, Sergej O. Demokritov, Vladislav E. Demidov
Summary: This study successfully demonstrates spin-wave devices that can operate without an external magnetic field using submicrometer wide waveguides. The experimental results show that these waveguides have a highly stable magnetic configuration at zero field and support long-range propagation of spin waves. These findings provide the basis for the development of energy-efficient zero-field spin-wave devices and circuits.
Article
Multidisciplinary Sciences
David A. Connelly, Gyorgy Csaba, Hadrian Renaldo O. Aquino, Gary H. Bernstein, Alexei Orlov, Wolfgang Porod, Jonathan Chisum
Summary: This paper introduces a system-level efficiency analysis and a rapid design methodology for efficient sub-micron, spin-wave transducers in a microwave system. By comparing magnetostatic-wave transducer theory to electromagnetic simulations, the paper finds that the theory is useful for rapid yet accurate transducer design. It further suggests that by modifying the theory to include the exchange interaction, it can also be useful for designing transducers launching magnons at exchange wavelengths.
SCIENTIFIC REPORTS
(2021)
Review
Chemistry, Multidisciplinary
Kuppusamy Senthil Kumar, Mario Ruben
Summary: This review covers the advances in vacuum-sublimable SCO complexes, including the design and synthesis of functional SCO complexes, on-surface SCO of thin films, and various device architectures based on sublimable SCO complexes.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Physics, Multidisciplinary
Lina G. Johnsen, Haakon T. Simensen, Arne Brataas, Jacob Linder
Summary: At the interface between a ferromagnetic insulator and a superconductor, a coupling between the spins of the two materials results in the induction of a magnon spin current in the adjacent ferromagnetic insulator by a supercurrent carried by triplet Cooper pairs. This effect is dominated by Cooper pairs polarized in the same direction as the ferromagnetic insulator, showing that charge and spin supercurrents produce similar results in this system. This study demonstrates a method of converting Cooper pair supercurrents into magnon spin currents.
PHYSICAL REVIEW LETTERS
(2021)
Article
Engineering, Electrical & Electronic
Alexander A. Martyshkin, Evgeniy N. Begin, Svetlana E. Sheshukova, Alexander A. Sadovnikov
Summary: This article experimentally demonstrates the propagation of magnetostatic surface spin wave (MSSW) in orthogonally joined yttrium iron garnet stripes. The transmission is affected by the distance between orthogonal yttrium iron garnet stripes, as observed using microwave spectroscopy technique. Micromagnetic modeling shows the presence of nonreciprocal propagation of spin waves (SWs) between all three ports of the T-junction.
IEEE TRANSACTIONS ON MAGNETICS
(2022)
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
Physics, Multidisciplinary
Xing Chen, Cuixiu Zheng, Yu Zhang, Sai Zhou, Yaowen Liu, Zongzhi Zhang
Summary: The investigation of magnetic excitations in interlayer exchange-coupled synthetic antiferromagnets with perpendicular magnetic anisotropy reveals new spin wave and polarization modes, as well as dynamic properties under bias magnetic fields. These findings provide fundamental insight into the potential spintronic applications of these materials.
NEW JOURNAL OF PHYSICS
(2021)
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
Materials Science, Multidisciplinary
S. M. Rezende, D. S. Maior, O. Alves Santos, J. Holanda
Summary: The recent experimental observations and theoretical predictions regarding spin currents and the interplay between magnetization-elastic dynamics have revitalized the field of spintronics. These experiments and theories have demonstrated the significance and potential of studying the unique phenomena in the field, opening up new directions for research.
Article
Engineering, Electrical & Electronic
Martina Kiechle, Levente Maucha, Valentin Ahrens, Carsten Dubs, Wolfgang Porod, Gyorgy Csaba, Markus Becherer, Adam Papp
Summary: This letter presents the design and experimental realization of a device that functions as a spin-wave lens, focusing spin waves to a specific location. The lens structure is nonconventional and generated by a machine-learning algorithm. The device operation is verified using the mumax(3) micromagnetic solver and experimental implementation. This work serves as a proof of concept for realizing more sophisticated spin-wave devices with complex functionalities.
IEEE MAGNETICS LETTERS
(2022)
Article
Physics, Applied
B. Divinskiy, N. Thiery, L. Vila, O. Klein, N. Beaulieu, J. Ben Youssef, S. O. Demokritov, V. E. Demidov
APPLIED PHYSICS LETTERS
(2020)
Article
Multidisciplinary Sciences
I. Borisenko, B. Divinskiy, V. E. Demidov, G. Li, T. Nattermann, V. L. Pokrovsky, S. O. Demokritov
NATURE COMMUNICATIONS
(2020)
Article
Physics, Multidisciplinary
S. O. Demokritov
JOURNAL OF EXPERIMENTAL AND THEORETICAL PHYSICS
(2020)
Article
Multidisciplinary Sciences
I. V. Borisenko, V. E. Demidov, V. L. Pokrovsky, S. O. Demokritov
SCIENTIFIC REPORTS
(2020)
Article
Physics, Applied
Boris Divinskiy, Guanxiong Chen, Sergei Urazhdin, Sergej O. Demokritov, Vladislav E. Demidov
PHYSICAL REVIEW APPLIED
(2020)
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
B. Divinskiy, H. Merbouche, K. O. Nikolaev, S. Michaelis de Vasconcellos, R. Bratschitsch, D. Gouere, R. Lebrun, V. Cros, J. Ben Youssef, P. Bortolotti, A. Anane, S. O. Demokritov, V. E. Demidov
Summary: The study investigates the propagation of nanosecond spin-wave pulses in microscopic waveguides made of nanometer-thick yttrium iron garnet films. It shows that dispersion leads to broadening of the pulse for most spin-wave frequencies, but can be suppressed leading to dispersionless pulse propagation in certain frequency intervals. This phenomenon is caused by competing effects of dipolar and exchange interactions, which can be controlled by varying the waveguide geometry.
PHYSICAL REVIEW APPLIED
(2021)
Article
Physics, Applied
S. R. Lake, B. Divinskiy, G. Schmidt, S. O. Demokritov, V. E. Demidov
Summary: The study investigates the propagation of spin waves in YIG waveguides with a decreasing width and varying length transition region, leading to wavelength downconversion and almost-dispersionless propagation of spin-wave pulses. The concentration of energy in these waveguides overcomes damping effects, resulting in an overall increase in spin-wave intensity during propagation. These findings have implications for improving the efficiency and functionality of magnonic devices using spin waves as an information carrier.
APPLIED PHYSICS LETTERS
(2021)
Article
Multidisciplinary Sciences
B. Divinskiy, H. Merbouche, V. E. Demidov, K. O. Nikolaev, L. Soumah, D. Gouere, R. Lebrun, V Cros, Jamal Ben Youssef, P. Bortolotti, A. Anane, S. O. Demokritov
Summary: Magnons, quantised magnetic excitations, can be driven into a Bose-Einstein condensation (BEC) state even at room temperature. The research demonstrates the possibility of achieving stationary equilibrium room-temperature magnon BEC via a spin-current, paving the way for integrated microscopic quantum magnonic and spintronic devices.
NATURE COMMUNICATIONS
(2021)
Article
Multidisciplinary Sciences
H. Merbouche, B. Divinskiy, K. O. Nikolaev, C. Kaspar, W. H. P. Pernice, D. Gouere, R. Lebrun, V Cros, J. Ben Youssef, P. Bortolotti, A. Anane, S. O. Demokritov, V. E. Demidov
Summary: This study demonstrates the complexity of nonlinear wave processes in microscopic magnetic structures and emphasizes the importance of understanding them for technical applications of spin waves in integrated devices.
SCIENTIFIC REPORTS
(2022)
Article
Physics, Applied
S. R. Lake, B. Divinskiy, G. Schmidt, S. O. Demokritov, V. E. Demidov
Summary: Phase-resolved imaging is used to study the nonlinear modification of wavelength in spin wave propagation. It is found that using moderate microwave power can generate spin waves with large amplitudes, and large precession angles lead to strong spatial dependence of wavelength. These findings are important for optimizing nonlinear integrated spin-wave signal-processing devices.
PHYSICAL REVIEW APPLIED
(2022)
Article
Physics, Applied
S. R. Lake, B. Divinskiy, G. Schmidt, S. O. Demokritov, V. E. Demidov
Summary: Magnonics utilizes both the amplitude and phase of spin waves, with tunable phase shifters being crucial elements for magnonic circuits. This study demonstrates that intrinsic magnetic nonlinearities enable efficient microscopic tunable phase shifters controlled by wave intensity. The phase shift tunability can reach over 360 degrees with a few milliwatts of microwave power, showing promise for integrated nano-magnonics in computing beyond Moore's Law.
APPLIED PHYSICS LETTERS
(2022)
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)
