Neel domain wall as a tunable filter for optically excited magnetostatic waves

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:534

Article

Khokhlov, N. E.¹  Khramova, A. E.^1,2,3  Filatov, Ia A.¹  Gerevenkov, P., I¹  Klinskaya, B. A.⁴  Kalashnikova, A. M.¹ 

[1] Ioffe Inst, 26 Politekhnicheskaya, St Petersburg 194021, Russia

[2] Moscow MV Lomonosov State Univ, Fac Phys, 1 Bld 2 Leninskie Gory, Moscow 119991, Russia

[3] Russian Quantum Ctr, 30 Bld 1 Bolshoy Bulvar,Skolkovo IC, Moscow 121205, Russia

[4] Acad Lyceum Phys Tech High Sch, 8 Khlopina, St Petersburg 194021, Russia

关键词: Spin waves;    Domain wall;    Ultrafast magnetism;    Spin dynamics;    Micromagnetism;   

DOI  :  10.1016/j.jmmm.2021.168018

来源: Elsevier

【 摘 要 】

We present a concept of a tunable optical excitation of spin waves and filtering their spectra in a ferromagnetic film with 180 degrees Neel domain wall. We show by means of micromagnetic simulation that the fluence of the femtosecond laser pulse and its position with respect to the domain wall affect the frequencies of the excited spin waves, and the presence of the domain wall plays crucial role in control of the spin waves' spectrum. The predicted effects are understood by analyzing the changes of the spin waves' dispersion under the impact of the laser pulse.

【 授权许可】

Free