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UID:DSC-22105
DTSTART;TZID=Europe/Berlin:20250714T145000
SEQUENCE:1752471409
TRANSP:OPAQUE
DTEND;TZID=Europe/Berlin:20250714T162000
URL:https://www.dresden-science-calendar.de/calendar/de/detail/22105
LOCATION:TUD\,    
SUMMARY:Schultheiß: Floquet magnons in a periodically-driven magnetic vort
 ex
CLASS:PUBLIC
DESCRIPTION:Speaker: Helmut Schultheiß\nInstitute of Speaker: HZDR\nTopics
 :\nPhysik\n Location:\n  Name: TUD (REC/C213)\n  Street:   \n  City:  \n  
 Phone: \n  Fax: \nDescription: <p><strong>Abstract</strong></p> <p>Magneti
 c vortices are prominent examples for topology in magnetism with a rich se
 t of dynamic properties. They exhibit an intricate magnon spectrum and sho
 w a special eigen-resonance of the vortex texture itself\, the gyroscopic 
 motion of the vortex core. While there have been studies about magnon-assi
 sted reversal of the vortex core polarity\, the impact of the vortex-core 
 motion on the magnon spectrum wasn’t addressed so far. These excitation 
 types are clearly separated by one order of magnitude in their resonance f
 requencies\, where magnons are in the lower-GHz range and the vortices typ
 ically gyrate at a few hundred MHz. This clear separation allows for exper
 iments studying the temporal evolution of the magnon spectrum when the mot
 ion of the vortex core is driven by an external stimulus. We present exper
 imental and numerical studies on how the magnon eigenstates are transforme
 d into Floquet bands\, when the vortex ground state is periodically modula
 ted in time by the gyroscopic motion of the vortex core. The existence of 
 the Floquet bands is evidenced by the appearance of magnon frequency combs
 \, where the comb spacing is determined by the frequency of the gyroscopic
  motion.</p> <p><strong>Z</strong><strong>oom</strong><strong>:</strong> 6
 88 4227 2214 (https://tu-dresden.zoom-x.de/j/68842272214?pwd=2nPGt3aESuZVl
 yhMAyv96TZRxkU9F9.1)\, Passcode: IFMP2024-5</p>
DTSTAMP:20260711T132014Z
CREATED:20250707T053916Z
LAST-MODIFIED:20250714T053649Z
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