2003/02/01 by Jing Xia, Xichao Zhang, Ming Yan +3
Engineering · Physics and Astronomy · #Anisotropy #Cherenkov radiation #Computer science #Condensed matter physics #Excited state #Ferromagnetism #Magnetic field #Magnetic properties of thin films #Magnetization #Magneto-Optical Properties and Applications #Magnonics #Materials science #Micromagnetics #Optics #Permalloy #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #STRIPS #Spin (aerodynamics) #Spin Hall effect #Spin polarization #Spin wave #Spintronics #Topological Materials and Phenomena #cond-mat.mes-hall #cond-mat.mtrl-sci
paper · pdf · doi:10.1038/srep25189
published in 潮 6(528), 221-229 (Nature Portfolio) · 6 pages, 5 figures. To be published in Scientific Reports
openalex publication_date 2003/02/01 · arxiv created 2016/04/12 · arxiv updated 2016/05/06 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/31
Spin-Cherenkov effect enables strong excitations of spin waves (SWs) with nonlinear wave dispersions. The Dzyaloshinskii-Moriya interaction (DMI) results in anisotropy and nonreciprocity of SWs propagation. In this work, we study the effect of the interfacial DMI on SW Cherenkov excitations in permalloy thin-film strips within the framework of micromagnetism. By performing micromagnetic simulations, it is shown that coherent SWs are excited when the velocity of a moving magnetic source exceeds the propagation velocity of the SWs. Moreover, the threshold velocity of the moving magnetic source with finite DMI can be reduced compared to the case of zero DMI. It thereby provides a promising route towards efficient spin wave generation and propagation, with potential applications in spintronic and magnonic devices.