Excitation of unidirectional exchange spin waves by a nanoscale magnetic grating

Chen，Jilei1; Yu，Tao2; Liu，Chuanpu1; Liu，Tao3; Madami，Marco4; Shen，Ka5; Zhang，Jianyu1; Tu，Sa1; Alam，Md Shah1; Xia，Ke6; Wu，Mingzhong3; Gubbiotti，Gianluca7; Blanter，Yaroslav M.2; Bauer，Gerrit E.W.2,8,9; Yu，Haiming1

2019-09-20

10.1103/PhysRevB.100.104427

PHYSICAL REVIEW B   影响因子和分区

2469-9950

2469-9969

Magnon spintronics is a prosperous field that promises beyond-CMOS technology based on elementary excitations of the magnetic order that act as information carriers for future computational architectures. Unidirectional propagation of spin waves is key to the realization of magnonic logic devices. However, previous efforts to enhance the magnetostatic surface spin wave nonreciprocity did not realize (let alone control) purely unidirectional propagation. Here we experimentally demonstrate excitation of unidirectional exchange spin waves by a nanoscale magnetic grating consisting of Co nanowires fabricated on an ultrathin yttrium iron garnet film. We explain and model the nearly perfect unidirectional excitation by the chirality of the magneto-dipolar interactions between the Kittel mode of the nanowires and the exchange spin waves of the film. Reversal of the magnetic configurations of film and nanowire array from parallel to antiparallel changes the direction of the excited spin waves. Our results raise the prospect of a chiral magnonic logic without the need to involve fragile surface states.

SCI ; EI

英语

NI论文

其他

US National Science Foundation[EFMA-1641989]

Materials Science ; Physics

Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:000488252100002

AMER PHYSICAL SOC

20194007493664

Computation theory ; Computer circuits ; Logic devices ; Nanowires ; Spin waves ; Yttrium iron garnet

Magnetism: Basic Concepts and Phenomena:701.2 ; Computer Circuits and Logic Elements:721 ; Nanotechnology:761 ; Solid State Physics:933

PHYSICS

2-s2.0-85072809637

Scopus

1.Fert Beijing InstituteBDBCSchool of MicroelectronicsBeihang University,Beijing,100191,China
2.Kavli Institute of NanoscienceDelft University of Technology,Delft,2628 CJ,Netherlands
3.Department of PhysicsColorado State University,Fort Collins,80523,United States
4.Dipartimento di Fisica e GeologiaUniversità di Perugia,Perugia,Via A. Pascoli,I-06123,Italy
5.Department of PhysicsBeijing Normal University,Beijing,100875,China
6.Institute for Quantum Science and EngineeringSouthern University of Science and Technology,Shenzhen,518055,China
7.Istituto Officina Dei Materiali Del Consiglio Nazionale Delle Ricerche (IOM-CNR)Sede di PerugiaC/o Dipartimento di Fisica e Geologia,Perugia,Via A. Pascoli,I-06123,Italy
8.Institute for Materials ResearchWPI-AIMRCSNRTohoku University,Sendai,980-8577,Japan
9.Zernike Institute for Advanced MaterialsUniversity of Groningen,Groningen,Nijenborgh 4,9747 AG,Netherlands

Chen，Jilei,Yu，Tao,Liu，Chuanpu,et al. Excitation of unidirectional exchange spin waves by a nanoscale magnetic grating[J]. PHYSICAL REVIEW B,2019,100(10).

Chen，Jilei.,Yu，Tao.,Liu，Chuanpu.,Liu，Tao.,Madami，Marco.,...&Yu，Haiming.(2019).Excitation of unidirectional exchange spin waves by a nanoscale magnetic grating.PHYSICAL REVIEW B,100(10).

Chen，Jilei,et al."Excitation of unidirectional exchange spin waves by a nanoscale magnetic grating".PHYSICAL REVIEW B 100.10(2019).