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Liang X, Cao Y, Yan P, Zhou Y. Asymmetric Magnon Frequency Comb. NANO LETTERS 2024; 24:6730-6736. [PMID: 38787290 DOI: 10.1021/acs.nanolett.4c01423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2024]
Abstract
We theoretically show the asymmetric spin wave transmission in a coupled waveguide-skyrmion structure, where the skyrmion acts as an effective nanocavity allowing the whispering gallery modes for magnons. The asymmetry originates from the chiral spin wave mode localized in the circular skyrmion wall. By inputting two-tone excitations and mixing them in the skyrmion wall, we observe a unidirectional output magnon frequency comb propagating in the waveguide with a record number of teeth (>50). This coupled waveguide-cavity structure turns out to be a universal paradigm for generating asymmetric magnon frequency combs, where the cavity can be generalized to other magnetic structures that support the whispering gallery mode of magnons. Our results advance the understanding of the nonlinear interaction between magnons and magnetic textures and open a new pathway to exploring the asymmetric spin wave transmission and to steering the magnon frequency comb.
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Affiliation(s)
- Xue Liang
- School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, Guangdong 518172, China
- School of Physics and State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Yunshan Cao
- School of Physics and State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Peng Yan
- School of Physics and State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Yan Zhou
- School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, Guangdong 518172, China
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2
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Szulc K, Tacchi S, Hierro-Rodríguez A, Díaz J, Gruszecki P, Graczyk P, Quirós C, Markó D, Martín JI, Vélez M, Schmool DS, Carlotti G, Krawczyk M, Álvarez-Prado LM. Reconfigurable Magnonic Crystals Based on Imprinted Magnetization Textures in Hard and Soft Dipolar-Coupled Bilayers. ACS NANO 2022; 16:14168-14177. [PMID: 36043881 PMCID: PMC9527808 DOI: 10.1021/acsnano.2c04256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Reconfigurable magnetization textures offer control of spin waves with promising properties for future low-power beyond-CMOS systems. However, materials with perpendicular magnetic anisotropy (PMA) suitable for stable magnetization-texture formation are characterized by high damping, which limits their applicability in magnonic devices. Here, we propose to overcome this limitation by using hybrid structures, i.e., a PMA layer magnetostatically coupled to a low-damping soft ferromagnetic film. We experimentally show that a periodic stripe-domain texture from a PMA layer is imprinted upon the soft layer and induces a nonreciprocal dispersion relation of the spin waves confined to the low-damping film. Moreover, an asymmetric bandgap features the spin-wave band diagram, which is a clear demonstration of collective spin-wave dynamics, a property characteristic for magnonic crystals with broken time-reversal symmetry. The composite character of the hybrid structure allows for stabilization of two magnetic states at remanence, with parallel and antiparallel orientation of net magnetization in hard and soft layers. The states can be switched using a low external magnetic field; therefore, the proposed system obtains an additional functionality of state reconfigurability. This study offers a link between reconfigurable magnetization textures and low-damping spin-wave dynamics, providing an opportunity to create miniaturized, programmable, and energy-efficient signal processing devices operating at high frequencies.
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Affiliation(s)
- Krzysztof Szulc
- Institute
of Spintronics and Quantum Information, Faculty of Physics, Adam Mickiewicz University, Poznań, Uniwersytetu Poznańskiego
2, 61-614 Poznań, Poland
- E-mail:
| | - Silvia Tacchi
- Istituto
Officina dei Materiali del CNR (CNR-IOM), Sede Secondaria di Perugia,
c/o Dipartimento di Fisica e Geologia, Università
di Perugia, I-06123 Perugia, Italy
- E-mail:
| | - Aurelio Hierro-Rodríguez
- Departamento
de Física, Facultad de Ciencias, Universidad de Oviedo, C/Federico García Lorca no 18, 33007 Oviedo, Spain
- Centro
de Investigación en Nanomateriales y Nanotecnología
(CINN), CSIC-Universidad de Oviedo, 33940 El Entrego, Spain
| | - Javier Díaz
- Departamento
de Física, Facultad de Ciencias, Universidad de Oviedo, C/Federico García Lorca no 18, 33007 Oviedo, Spain
- Centro
de Investigación en Nanomateriales y Nanotecnología
(CINN), CSIC-Universidad de Oviedo, 33940 El Entrego, Spain
| | - Paweł Gruszecki
- Institute
of Spintronics and Quantum Information, Faculty of Physics, Adam Mickiewicz University, Poznań, Uniwersytetu Poznańskiego
2, 61-614 Poznań, Poland
| | - Piotr Graczyk
- Institute
of Molecular Physics, Polish Academy of Sciences, M. Smoluchowskiego 17, 60-179 Poznań, Poland
| | - Carlos Quirós
- Departamento
de Física, Facultad de Ciencias, Universidad de Oviedo, C/Federico García Lorca no 18, 33007 Oviedo, Spain
- Centro
de Investigación en Nanomateriales y Nanotecnología
(CINN), CSIC-Universidad de Oviedo, 33940 El Entrego, Spain
| | - Daniel Markó
- Université
Paris-Saclay, UVSQ, CNRS, GEMaC, 78000 Versailles, France
| | - José Ignacio Martín
- Departamento
de Física, Facultad de Ciencias, Universidad de Oviedo, C/Federico García Lorca no 18, 33007 Oviedo, Spain
- Centro
de Investigación en Nanomateriales y Nanotecnología
(CINN), CSIC-Universidad de Oviedo, 33940 El Entrego, Spain
| | - María Vélez
- Departamento
de Física, Facultad de Ciencias, Universidad de Oviedo, C/Federico García Lorca no 18, 33007 Oviedo, Spain
- Centro
de Investigación en Nanomateriales y Nanotecnología
(CINN), CSIC-Universidad de Oviedo, 33940 El Entrego, Spain
| | - David S. Schmool
- Université
Paris-Saclay, UVSQ, CNRS, GEMaC, 78000 Versailles, France
| | - Giovanni Carlotti
- Dipartimento
di Fisica e Geologia, Università
di Perugia, I-06123 Perugia, Italy
| | - Maciej Krawczyk
- Institute
of Spintronics and Quantum Information, Faculty of Physics, Adam Mickiewicz University, Poznań, Uniwersytetu Poznańskiego
2, 61-614 Poznań, Poland
| | - Luis Manuel Álvarez-Prado
- Departamento
de Física, Facultad de Ciencias, Universidad de Oviedo, C/Federico García Lorca no 18, 33007 Oviedo, Spain
- Centro
de Investigación en Nanomateriales y Nanotecnología
(CINN), CSIC-Universidad de Oviedo, 33940 El Entrego, Spain
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Li Z, Dong B, He Y, Chen A, Li X, Tian JH, Yan C. Propagation of Spin Waves in a 2D Vortex Network. NANO LETTERS 2021; 21:4708-4714. [PMID: 34014682 DOI: 10.1021/acs.nanolett.1c00971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Efficient propagation of spin waves in a magnetically coupled vortex is crucial to the development of future magnonic devices. Thus far, only a double vortex can serve as spin-wave emitter or oscillator; the propagation of spin waves in the higher-order vortex is still lacking. Here, we experimentally realize a higher-order vortex (2D vortex network) by a designed nanostructure, containing four cross-type chiral substructures. We employ this vortex network as a waveguide to propagate short-wavelength spin waves (∼100 nm) and demonstrate the possibility of guiding spin waves from one vortex to the network. It is observed that the spin waves can propagate into the network through the nanochannels formed by the Bloch-Néel-type domain walls, with a propagation decay length of several micrometers. This technique paves the way for the development of low-energy, reprogrammable, and miniaturized magnonic devices.
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Affiliation(s)
- Zhenghua Li
- Key Laboratory of New Energy and Rare Earth Resource Utilization of State Ethnic Affairs Commission, School of Physics and Materials Engineering, Dalian Minzu University, Dalian, 116600, China
| | - Bin Dong
- Key Laboratory of New Energy and Rare Earth Resource Utilization of State Ethnic Affairs Commission, School of Physics and Materials Engineering, Dalian Minzu University, Dalian, 116600, China
| | - Yangyang He
- Key Laboratory of New Energy and Rare Earth Resource Utilization of State Ethnic Affairs Commission, School of Physics and Materials Engineering, Dalian Minzu University, Dalian, 116600, China
| | - Aiying Chen
- School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China
| | - Xiang Li
- School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China
| | - Jing-Hua Tian
- College of Energy, Soochow Institute for Energy and Materials Innovations & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006, China
| | - Chenglin Yan
- College of Energy, Soochow Institute for Energy and Materials Innovations & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006, China
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Chen J, Hu J, Yu H. Chiral Emission of Exchange Spin Waves by Magnetic Skyrmions. ACS NANO 2021; 15:4372-4379. [PMID: 33645959 DOI: 10.1021/acsnano.0c07805] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Spin waves or their quanta magnons raise the prospect to act as information carriers in the absence of Joule heating. The challenge to excite spin waves with nanoscale wavelengths free of nanolithography becomes a critical bottleneck for the application of nanomagnonics. Magnetic skyrmions are chiral magnetic textures at the nanoscale. In this work, short-wavelength exchange spin waves are demonstrated to be chirally emitted in a low damping magnetic insulating thin film by magnetic skyrmions. The spin-wave chirality originates from the chiral spin pumping effect and is determined by the cross product of the magnetization orientation and the film normal direction. The Halbach effect explains the enhancement or attenuation of the spin-wave amplitude with a reversed sign of the Dyzaloshinskii-Moriya interaction. Controllable spin-wave propagation is demonstrated by rotating a moderate applied field. Our findings are key for building compact low-power nanomagnonic devices based on intrinsic nanoscale magnetic textures.
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Affiliation(s)
- Jilei Chen
- Shenzhen Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
- Fert Beijing Institute, School of Integrated Circuit Science and Engineering, Beijing Advanced Innovation Center for Big Data and Brain Computing, Beihang University, Beijing 100191, China
| | - Junfeng Hu
- Fert Beijing Institute, School of Integrated Circuit Science and Engineering, Beijing Advanced Innovation Center for Big Data and Brain Computing, Beihang University, Beijing 100191, China
| | - Haiming Yu
- Shenzhen Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
- Fert Beijing Institute, School of Integrated Circuit Science and Engineering, Beijing Advanced Innovation Center for Big Data and Brain Computing, Beihang University, Beijing 100191, China
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5
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Dynamic and static properties of stadium-shaped antidot arrays. Sci Rep 2020; 10:20024. [PMID: 33208879 PMCID: PMC7674446 DOI: 10.1038/s41598-020-77074-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Accepted: 11/04/2020] [Indexed: 11/11/2022] Open
Abstract
In this work we performed a detailed numerical analysis on the static and dynamic properties of magnetic antidot arrays as a function of their geometry. In particular, we explored how by varying the shape of these antidot arrays from circular holes to stadium-shaped holes, we can effectively control the magnetic properties of the array. Using micromagnetic simulations we evidenced that coercivity is very sensitive to the shape of antidots, while the remanence is more robust to these changes. Furthermore, we studied the dynamic susceptibility of these systems, finding that it is possible to control both the position and the number of resonance peaks simply by changing the geometry of the holes. Thus, this work provides useful insights on the behavior of antidot arrays for different geometries, opening routes for the design and improvement of two-dimensional technologies.
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6
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Saavedra E, Corona RM, Vidal-Silva N, Palma JL, Altbir D, Escrig J. Dynamic and static properties of stadium-shaped antidot arrays. Sci Rep 2020. [DOI: 10.1016/j.mnl.2012.11.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
AbstractIn this work we performed a detailed numerical analysis on the static and dynamic properties of magnetic antidot arrays as a function of their geometry. In particular, we explored how by varying the shape of these antidot arrays from circular holes to stadium-shaped holes, we can effectively control the magnetic properties of the array. Using micromagnetic simulations we evidenced that coercivity is very sensitive to the shape of antidots, while the remanence is more robust to these changes. Furthermore, we studied the dynamic susceptibility of these systems, finding that it is possible to control both the position and the number of resonance peaks simply by changing the geometry of the holes. Thus, this work provides useful insights on the behavior of antidot arrays for different geometries, opening routes for the design and improvement of two-dimensional technologies.
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