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UID:DSC-21420
DTSTART;TZID=Europe/Berlin:20241122T103000
SEQUENCE:1732257854
TRANSP:OPAQUE
DTEND;TZID=Europe/Berlin:20241122T113000
URL:https://www.dresden-science-calendar.de/calendar/de/detail/21420
LOCATION:IFW\, Helmholtzstraße 2001069 Dresden
SUMMARY:Onbasli: Room-Temperature Topological Spin Textures for Next Genera
 tion Spintronics
CLASS:PUBLIC
DESCRIPTION:Speaker: Dr. Mehmet Cengiz Onbasli\nInstitute of Speaker: Koc U
 niversity\nTopics:\n\n Location:\n  Name: IFW (B3E.26\, IFW Dresden)\n  St
 reet: Helmholtzstraße 20\n  City: 01069 Dresden\n  Phone: \n  Fax: \nDesc
 ription: Topological spin textures like skyrmions and hopfions have emerge
 d as promising candidates for low-power spintronic devices. However\, stab
 ilizing these textures at room temperature remains challenging. In this ta
 lk\, we present the first observation of robust hopfion-skyrmion assemblie
 s at room temperature and zero field in EuS-Bi2Se3-EuS trilayer heterostru
 ctures. Using Lorentz transmission electron microscopy\, we directly visua
 lize triangular skyrmion lattices encircled by hopfion rings. Polarized ne
 utron reflectometry and SQUID magnetometry confirm room-temperature interf
 acial ferromagnetism. Micromagnetic modeling reveals that the interplay be
 tween Dzyaloshinskii-Moriya interactions\, uniaxial anisotropy\, and geome
 tric confinement stabilizes these topological textures. We demonstrate tha
 t the skyrmion-hopfion assemblies can be tuned by varying the island size 
 and magnetic field. Our results provide insight into the fundamental mecha
 nisms governing topological spin textures at ferromagnet-topological insul
 ator interfaces. The ability to create and manipulate room-temperature sky
 rmions and hopfions opens new avenues for topological spintronics\, potent
 ially enabling energy-efficient memory and logic devices. We will discuss 
 the implications of our findings for developing practical spintronic appli
 cations based on topologically protected magnetic states.
DTSTAMP:20260608T042709Z
CREATED:20241023T053720Z
LAST-MODIFIED:20241122T064414Z
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