Journal ArticleDOI
Graded-index magnonics
C. S. Davies,V. V. Kruglyak +1 more
TLDR
In this paper, the authors present a review of the challenges and opportunities in the field of graded magnonic wave solutions of the Landau-Lifshitz equation (spin waves).Abstract:
The wave solutions of the Landau–Lifshitz equation (spin waves) are characterized by some of the most complex and peculiar dispersion relations among all waves. For example, the spin-wave (“magnonic”) dispersion can range from the parabolic law (typical for a quantum-mechanical electron) at short wavelengths to the nonanalytical linear type (typical for light and acoustic phonons) at long wavelengths. Moreover, the long-wavelength magnonic dispersion has a gap and is inherently anisotropic, being naturally negative for a range of relative orientations between the effective field and the spin-wave wave vector. Nonuniformities in the effective field and magnetization configurations enable the guiding and steering of spin waves in a deliberate manner and therefore represent landscapes of graded refractive index (graded magnonic index). By analogy to the fields of graded-index photonics and transformation optics, the studies of spin waves in graded magnonic landscapes can be united under the umbrella of the graded-index magnonics theme and are reviewed here with focus on the challenges and opportunities ahead of this exciting research direction.read more
Citations
More filters
Journal ArticleDOI
The 2021 Magnonics Roadmap.
Anjan Barman,Gianluca Gubbiotti,Sam Ladak,A. O. Adeyeye,Maciej Krawczyk,Joachim Gräfe,Christoph Adelmann,Sorin Cotofana,Azad Naeemi,Vitaliy I. Vasyuchka,Burkard Hillebrands,Sergey A. Nikitov,H. Yu,Dirk Grundler,A. V. Sadovnikov,A. A. Grachev,Svetlana E. Sheshukova,J. Y. Duquesne,M. Marangolo,György Csaba,Wolfgang Porod,Vladislav E. Demidov,Sergei Urazhdin,Sergej O. Demokritov,Edoardo Albisetti,Daniela Petti,Riccardo Bertacco,Helmut Schultheiss,Helmut Schultheiss,V. V. Kruglyak,V. D. Poimanov,Sourav Sahoo,Jaivardhan Sinha,Hyunsoo Yang,Markus Münzenberg,Takahiro Moriyama,Shigemi Mizukami,P. Landeros,P. Landeros,R. A. Gallardo,R. A. Gallardo,Giovanni Carlotti,Joo-Von Kim,Robert Stamps,Robert E. Camley,Bivas Rana,Yoshichika Otani,Weichao Yu,Tao Yu,Gerrit E. W. Bauer,Gerrit E. W. Bauer,Christian H. Back,Götz S. Uhrig,Oleksandr V. Dobrovolskiy,B. Budinska,Huajun Qin,S. van Dijken,Andrii V. Chumak,Alexander Khitun,Dmitri E. Nikonov,I. A. Young,Benjamin Zingsem,Michael Winklhofer +62 more
TL;DR: The Roadmap on Magnonics as mentioned in this paper is a collection of 22 sections written by leading experts in this field who review and discuss the current status but also present their vision of future perspectives.
Journal ArticleDOI
Parallel pumping for magnon spintronics: Amplification and manipulation of magnon spin currents on the micron-scale
TL;DR: In this paper, a review of the recent developments and achievements in the field of parallel parametric amplification of spin wave and magnon spintronics can be found, which is motivated not only by the fact that amplifiers are an important tool for the construction of any extended logic network but also by the unique properties of parametric amplifiers.
Journal ArticleDOI
Advances in Magnetics Roadmap on Spin-Wave Computing
TL;DR: Magnonics addresses the physical properties of spin waves and utilizes them for data processing as mentioned in this paper , and many proof-of-concept prototypes have already been realized in laboratories, such as the one presented in this article.
Journal ArticleDOI
Control of Spin-Wave Propagation using Magnetisation Gradients.
Marc Vogel,Rick Aßmann,Philipp Pirro,Andrii V. Chumak,Burkard Hillebrands,Georg von Freymann,Georg von Freymann +6 more
TL;DR: In this paper, the in-plane direction of a propagating spin wave can be changed by up to 90 degrees using an externally induced magnetic gradient field, in which the backward volume and surface spin-wave modes coexist at the same frequency.
Journal ArticleDOI
Adiabatic Control of Spin-Wave Propagation using Magnetisation Gradients
Marc Vogel,Rick Aßmann,Philipp Pirro,Andrii V. Chumak,Burkard Hillebrands,Georg von Freymann +5 more
TL;DR: It is reported that in an in-plane magnetised magnetic film the in- plane direction of a propagating spin wave can be changed by up to 90 degrees using an externally induced magnetic gradient field.
References
More filters
Journal ArticleDOI
A thermodynamic theory of “weak” ferromagnetism of antiferromagnetics
TL;DR: In this paper, a thermodynamic theory of weak ferromagnetism of α-Fe 2 O 3, MnCO 3 and CoCO 3 is developed on the basis of landau's theory of phase transitions of the second kind.
Journal ArticleDOI
Magnetostatic modes of a ferromagnet slab
R.W. Damon,J.R. Eshbach +1 more
TL;DR: In this paper, a thin slab magnetized in its plane is obtained in the magnetostatic limit and the mode distribution in wave-vector space is obtained for both the volume and surface modes, and the dependence of mode density on wavelength is discussed.
Journal ArticleDOI
Spin Caloritronics
TL;DR: A brief overview of the state of the art of spin caloritronics can be found in this article, where the authors describe the science and technology of controlling heat currents by the electron spin degree of freedom (and vice versa).
Journal ArticleDOI
Theory of dipole-exchange spin wave spectrum for ferromagnetic films with mixed exchange boundary conditions
Boris A. Kalinikos,Andrei Slavin +1 more
TL;DR: In this article, a theory for dispersion characteristics of spin waves in ferromagnetic films taking into account both the dipole-dipole and the exchange interactions is developed.
Journal ArticleDOI
Magnonic logic circuits
TL;DR: The functional throughput of the magnonic logic gates is estimated and compared with the conventional transistor-based approach, offering a significant functional advantage over the traditional approach.