Long-Distance Coherent Propagation of High-Velocity Antiferromagnetic Spin Waves

被引：19

作者：

Wang, Hanchen ^{[1
,2
,3
]}

Yuan, Rundong ^{[1
]}

Zhou, Yongjian ^{[4
]}

Zhang, Yuelin ^{[1
]}

Chen, Jilei ^{[2
,5
]}

Liu, Song ^{[2
,5
]}

Jia, Hao ^{[2
,5
]}

Yu, Dapeng ^{[2
,5
]}

Ansermet, Jean-Philippe ^{[5
,6
]}

Song, Cheng ^{[4
]}

Yu, Haiming ^{[1
,2
]}

机构：

[1] Beihang Univ, Fert Beijing Inst, Sch Integrated Circuit Sci & Engn, MIIT Key Lab Spintron, Beijing 100191, Peoples R China

[2] Int Quantum Acad, Shenzhen 518048, Peoples R China

[3] Swiss Fed Inst Technol, Dept Mat, CH-8093 Zurich, Switzerland

[4] Tsinghua Univ, Sch Mat Sci & Engn, Key Lab Adv Mat MOE, Beijing 100084, Peoples R China

[5] Southern Univ Sci & Technol, Shenzhen Inst Quantum Sci & Engn, Shenzhen 518055, Peoples R China

[6] Ecole Polytech Fed Lausanne EPFL, Inst Phys, CH-1015 Lausanne, Switzerland

来源：

PHYSICAL REVIEW LETTERS | 2023年 / 130卷 / 09期

关键词：

MAGNETIC DOMAIN-WALLS;

D O I：

10.1103/PhysRevLett.130.096701

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on coherent propagation of antiferromagnetic (AFM) spin waves over a long distance (similar to 10 mu m) at room temperature in a canted AFM alpha-Fe2O3 owing to the Dzyaloshinskii-Moriya interaction (DMI). Unprecedented high group velocities (up to 22.5 km/s) are characterized by microwave transmission using all-electrical spin wave spectroscopy. We derive analytically AFM spin-wave dispersion in the presence of the DMI which accounts for our experimental results. The AFM spin waves excited by nanometric coplanar waveguides have large wave vectors in the exchange regime and follow a quasilinear dispersion relation. Fitting of experimental data with our theoretical model yields an AFM exchange stiffness length of 1.7 angstrom. Our results provide key insights on AFM spin dynamics and demonstrate high-speed functionality for AFM magnonics.

引用

页数：7

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