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
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
Chemistry, Multidisciplinary
Jilei Chen, Junfeng Hu, Haiming Yu
Summary: This study demonstrates the chirally emitted short-wavelength exchange spin waves in a low damping magnetic insulating thin film under the presence of magnetic skyrmions. The chirality of spin waves is attributed to the chiral spin pumping effect, with potential applications in nanomagnonics.
Article
Chemistry, Multidisciplinary
Sina Mayr, Lukas Flajsman, Simone Finizio, Ales Hrabec, Markus Weigand, Johannes Forster, Hermann Stoll, Laura J. Heyderman, Michal Urbanek, Sebastian Wintz, Jorg Raabe
Summary: The influence of a static in-plane magnetic field on the emission of nanoscale spin waves from magnetic vortex cores is studied in disk structures of synthetic ferrimagnets and single ferromagnetic layers. Increasing magnetic bias field displaces the wave-emitting vortex core from the center of the disk toward its edge without altering the spin-wave dispersion relation noticeably. At higher magnetic fields, anisotropic lateral expansion of the core occurs in single-layer disks leading to directional emission and propagation of waves.
Article
Materials Science, Multidisciplinary
Nimisha Arora, Pintu Das
Summary: Artificial spin ice is an engineered lattice used to study spin ice behavior. Nanomagnets interact via dipolar interaction, leading to macroscopic spin configuration states. The study reveals that careful selection of vertices with local magnetic charges can effectively control spin wave excitation in neighboring nanomagnets.
Article
Engineering, Electrical & Electronic
A. V. Chumak, P. Kabos, M. Wu, C. Abert, C. Adelmann, A. O. Adeyeye, J. Akerman, F. G. Aliev, A. Anane, A. Awad, C. H. Back, A. Barman, G. E. W. Bauer, M. Becherer, E. N. Beginin, V. A. S. V. Bittencourt, Y. M. Blanter, P. Bortolotti, I. Boventer, D. A. Bozhko, S. A. Bunyaev, J. J. Carmiggelt, R. R. Cheenikundil, F. Ciubotaru, S. Cotofana, G. Csaba, O. V. Dobrovolskiy, C. Dubs, M. Elyasi, K. G. Fripp, H. Fulara, I. A. Golovchanskiy, C. Gonzalez-Ballestero, P. Graczyk, D. Grundler, P. Gruszecki, G. Gubbiotti, K. Guslienko, A. Haldar, S. Hamdioui, R. Hertel, B. Hillebrands, T. Hioki, A. Houshang, C. -M. Hu, H. Huebl, M. Huth, E. Iacocca, M. B. Jungfleisch, G. N. Kakazei, A. Khitun, R. Khymyn, T. Kikkawa, M. Klaui, O. Klein, J. W. Klos, S. Knauer, S. Koraltan, M. Kostylev, M. Krawczyk, I. N. Krivorotov, V. V. Kruglyak, D. Lachance-Quirion, S. Ladak, R. Lebrun, Y. Li, M. Lindner, R. Macedo, S. Mayr, G. A. Melkov, S. Mieszczak, Y. Nakamura, H. T. Nembach, A. A. Nikitin, S. A. Nikitov, V. Novosad, J. A. Otalora, Y. Otani, A. Papp, B. Pigeau, P. Pirro, W. Porod, F. Porrati, H. Qin, B. Rana, T. Reimann, F. Riente, O. Romero-Isart, A. Ross, A. V. Sadovnikov, A. R. Safin, E. Saitoh, G. Schmidt, H. Schultheiss, K. Schultheiss, A. A. Serga, S. Sharma, J. M. Shaw, D. Suess, O. Surzhenko, K. Szulc, T. Taniguchi, M. Urbanek, K. Usami, A. B. Ustinov, T. van der Sar, S. van Dijken, V. I. Vasyuchka, R. Verba, S. Viola Kusminskiy, Q. Wang, M. Weides, M. Weiler, S. Wintz, S. P. Wolski, X. Zhang
Summary: Magnonics is a discipline that explores the physical properties of spin waves and utilizes them for data processing. It offers several advantages, such as scalability to atomic dimensions, operation in high-frequency ranges, utilization of nonlinear and nonreciprocal phenomena, and compatibility with CMOS technology. Although primarily in the academic domain, extensive research is being conducted to address the scientific and technological challenges, with several proof-of-concept prototypes already realized in laboratories.
IEEE TRANSACTIONS ON MAGNETICS
(2022)
Article
Nanoscience & Nanotechnology
Rair Macedo, Arjun S. Kudinoor, Karen L. Livesey, Robert E. Camley
Summary: The consequences of non-uniform exchange in magnetic systems have been reported, inspired by the quantum mechanical exchange interaction between spins responsible for magnetic order. A linearly varying exchange interaction is used to break spatial inversion symmetry, allowing for the design of nonreciprocal magnetic signal excitation at tunable frequencies. The authors' work predicts the occurrence of nonreciprocity across a vast range of frequencies, up to hundreds of GHz.
ADVANCED ELECTRONIC MATERIALS
(2022)
Review
Chemistry, Multidisciplinary
Pramod Ghising, Chandan Biswas, Young Hee Lee
Summary: An alternative approach to charge-based electronics is to use the spin degree of freedom for information communication and processing. Graphene, with its long spin-diffusion length at room temperature, shows promise for highly scalable spintronics. The development of graphene spin valves has paved the way for spin devices in graphene, such as spin field-effect transistors and spin majority logic gates. This review examines the progress in graphene spin valves and their role in advancing spin logic devices, discussing different transport mechanisms and comparing the energy efficiency between graphene spin valves and charge-based field-effect transistors.
ADVANCED MATERIALS
(2023)
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
Gauthier Philippe, Mathieu Moalic, Jaroslaw W. Klos
Summary: We demonstrate the use of the spin wave Cherenkov effect to design a unidirectional spin wave emitter with tunable frequency and switchable direction of emission. By using a pair of traveling profiles of the magnetic field, spin waves can be generated and their propagation and interference effects can be controlled in the system. This work opens up new possibilities for experimental studies in hybrid magnonic-superconducting systems.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Krzysztof Sobucki, Wojciech Smigaj, Piotr Graczyk, Maciej Krawczyk, Pawel Gruszecki
Summary: We numerically demonstrate the excitation of leaky spin waves guided along a ferromagnetic stripe by obliquely incident spin wave beam on the edge of a thin film below the stripe. During propagation, leaky waves emit energy back into the layer as plane waves and laterally shifted parallel spin wave beams. This resonance excitation, combined with interference effects, leads to the magnonic Wood's anomaly and an increased Goos-Ha''nchen shift magnitude, providing a platform for controlling spin wave reflection and transdimensional magnonic routers.
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
Engineering, Electrical & Electronic
Hadrian Renaldo O. Aquino, David Connelly, Alexei Orlov, Jonathan Chisum, Gary H. Bernstein, Wolfgang Porod
Summary: This paper presents a transducer design that converts electrical signals into short-wavelength volume spin waves. By exciting large-wavelength spin waves and transforming them into short-wavelength spin waves, the design successfully converts the original electrical signal. Simulations show that this design is able to excite spin waves with significantly larger amplitudes (>10x) than an appropriately sized coplanar waveguide on top of the magnetic film with the same input power.
IEEE TRANSACTIONS ON MAGNETICS
(2023)
Article
Physics, Applied
A. A. Grachev, S. E. Sheshukova, M. P. Kostylev, S. A. Nikitov, A. V. Sadovnikov
Summary: We report on the coupling of spin waves propagating as guided modes of yttrium iron garnet stripes. The coupling is due to the long-range dynamic magnetic field of the precessing magnetization vector. We propose controlling the coupling characteristics through variation of the static magnetization angle.
PHYSICAL REVIEW APPLIED
(2023)
Article
Chemistry, Multidisciplinary
Rostyslav O. Serha, Dmytro A. Bozhko, Milan Agrawal, Roman V. Verba, Mikhail Kostylev, Vitaliy Vasyuchka, Burkard Hillebrands, Alexander A. Serga
Summary: This study reports a method to improve spin wave transmission in YIG/Pt bilayers by changing the excitation configuration, which reduces attenuation caused by eddy currents in the Pt layer, making it suitable for spintronic devices.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
E. Albisetti, D. Petti, M. Pancaldi, M. Madami, S. Tacchi, J. Curtis, W. P. King, A. Papp, G. Csaba, W. Porod, P. Vavassori, E. Riedo, R. Bertacco
NATURE NANOTECHNOLOGY
(2016)
Article
Multidisciplinary Sciences
Adam Papp, Wolfgang Porod, Arpad I. Csurgay, Gyorgy Csaba
SCIENTIFIC REPORTS
(2017)
Article
Engineering, Electrical & Electronic
Stephan Breitkreutz-von Gamm, Adam Papp, Eugen Egel, Christian Meier, Cenk Yilmaz, Leonhard Heiss, Wolfgang Porod, Gyoergy Csaba
IEEE MAGNETICS LETTERS
(2017)
Article
Physics, Condensed Matter
Adam Papp, Gyorgy Csaba, Himadri Dey, Marco Madami, Wolfgang Porod, Giovanni Carlotti
EUROPEAN PHYSICAL JOURNAL B
(2018)
Article
Engineering, Electrical & Electronic
Adam Papp, Gyorgy Csaba
IEEE MAGNETICS LETTERS
(2018)
Article
Materials Science, Multidisciplinary
Simon Mendisch, Grazvydas Ziemys, Valentin Ahrens, Adam Papp, Markus Becherer
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2019)
Article
Materials Science, Multidisciplinary
Simon Mendsich, Valentin Ahrens, Martina Kiechle, Adam Papp, Markus Becherer
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2020)
Article
Multidisciplinary Sciences
Adam Papp, Martina Kiechle, Simon Mendisch, Valentin Ahrens, Levent Sahin, Lukas Seitner, Wolfgang Porod, Gyorgy Csaba, Markus Becherer
Summary: In this study, we experimentally demonstrated the operation of a Rowland-type concave grating for spin waves, potentially for use as a microwave spectrometer. Spin waves were coherently excited on a diffraction grating and focused to a point corresponding to their frequency. The diffraction grating was created using focused-ion-beam irradiation to locally eliminate ferrimagnetic properties of YIG. Our experiments revealed spin waves were created by an indirect excitation mechanism, utilizing nonlinear resonance between the grating and coplanar waveguide, paving the way for future use as a spectrometer with linear excitation.
SCIENTIFIC REPORTS
(2021)
Article
Multidisciplinary Sciences
Adam Papp, Wolfgang Porod, Gyorgy Csaba
Summary: Wave based computing in neuromorphic systems utilizes spin-waves for non-linear operations, with signal routing and weight interconnections achieved through interference of scattered waves. Training the network involves finding the desired input-output mapping field pattern, and the computational power greatly increases in the non-linear interference regime.
NATURE COMMUNICATIONS
(2021)
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)
Proceedings Paper
Engineering, Electrical & Electronic
H. Aquino, D. Connelly, A. Papp, A. Orlov, J. Chisum, G. H. Bernstein, W. Porod
2020 IEEE SILICON NANOELECTRONICS WORKSHOP (SNW)
(2020)
Proceedings Paper
Computer Science, Theory & Methods
Adam Papp, Gyorgy Csaba, Wolfgang Porod
2016 IEEE INTERNATIONAL CONFERENCE ON REBOOTING COMPUTING (ICRC)
(2016)
Proceedings Paper
Engineering, Electrical & Electronic
A. Papp, G. Csaba, W. Porod
18TH INTERNATIONAL WORKSHOP ON COMPUTATIONAL ELECTRONICS (IWCE 2015)
(2015)
Proceedings Paper
Engineering, Electrical & Electronic
Gyorgy Csaba, Adam Papp, Wolfgang Porod, Ramazan Yeniceri
ESSDERC 2015 PROCEEDINGS OF THE 45TH EUROPEAN SOLID-STATE DEVICE RESEARCH CONFERENCE
(2015)
