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SUMMARY:New Scanning Probes for Nanomagnetic Imaging
DTSTART:20180518T151500
DTSTAMP:20260430T010207Z
UID:9a4ac3e2c3c7da19cc0aa5d2aeb560e5af7b7b886b9c8c3c5809f816
CATEGORIES:Conferences - Seminars
DESCRIPTION:Martino Poggio  Department of Physics at the University of Ba
 sel \nI will discuss recent experiments in our group aimed at developing 
 and applying two promising new magnetic scanning probes.\n\nThe first prob
 e is based on newly developed nanowire (NW) force sensors\, which have rec
 ently enabled a form of AFM capable of mapping both the size and direction
  of tip-sample forces.  I will present first results in which we functio
 nalize such NWs with nanometer-scale magnetic tip and characterize their b
 ehavior.  Using these NW sensors\, we intend to realize a form of vectori
 al MFM capable of mapping stray magnetic fields with enhanced sensitivity
  and resolution compared to the state of the art.\nThe second scanning pro
 be consists of a sharp quartz tip with a nanometer-scale superconducting q
 uantum interference device (SQUID) integrated on its end.  This SQUID-on-
 tip (SOT) sensor achieves record sensitivity to both stray magnetic flux 
 and local thermal dissipation. I will discuss experiments using this devic
 e to map the stray magnetic field produced by individual nanomagnets and 
 superconducting vortices.\nThe unique capabilities of both of these scanni
 ng probes may provide new types of imaging contrast for in a variety of ph
 ysical systems.  These include nanometer-scale magnetic structures such 
 as domain walls\, magnetic vortices\, and magnetic skyrmions.  The abilit
 y to map mesoscopic current flow in two-dimensional materials and topologi
 cal insulators or image magnetic field produced by superconducting films 
 and nanostructures could shed light on a number of open questions. \n\n\n
 About the research of the speaker\n 
LOCATION:CE 1 5 https://plan.epfl.ch/?room==CE%201%205
STATUS:CONFIRMED
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