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VERSION:2.0
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SUMMARY:New Scanning Probes for Nanomagnetic Imaging
DTSTART:20180518T150000
DTSTAMP:20260510T164805Z
UID:712bfac76896387b36e67b29c0ee08405fe8917624ec8e73f66fd078
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.\n\nThe second scanning p
 robe consists of a sharp quartz tip with a nanometer-scale superconducting
  quantum interference device (SQUID) integrated on its end.  This SQUID-o
 n-tip (SOT) sensor achieves record sensitivity to both stray magnetic flu
 x and local thermal dissipation. I will discuss experiments using this dev
 ice to map the stray magnetic field produced by individual nanomagnets an
 d superconducting vortices.\nThe unique capabilities of both of these scan
 ning probes may provide new types of imaging contrast for in a variety of 
 physical systems.  These include nanometer-scale magnetic structures such
  as domain walls\, magnetic vortices\, and magnetic skyrmions.  The abil
 ity to map mesoscopic current flow in two-dimensional materials and topolo
 gical insulators or image magnetic field produced by superconducting film
 s and nanostructures could shed light on a number of open questions. \n\n
 Bio: Martino Poggio received his B.A. in physics from Harvard University 
 in 2000 and his Ph.D. from the University of California\, Santa Barbara i
 n 2005. In graduate school he worked for Prof. David Awschalom on ultrafa
 st optics and semiconductor spintronics. After receiving his doctorate\, 
 he started work as a post-doctoral fellow at the Center for Probing the N
 anoscale\, a joint center between Stanford University and IBM Corporation
  funded by the National Science Foundation. Until late 2008 he worked in 
 this capacity in Dr. Dan Rugar’s lab at the IBM Almaden Research Center
  in San Jose\, CA on high sensitivity nuclear magnetic resonance force m
 icroscopy. In January of 2009\, he started work as Argovia Assistant Prof
 essor in the Department of Physics at the University of Basel. In 2014\, 
 he was promoted to Associate Professor. Prof. Poggio is a winner of a 201
 3 ERC Starting Grant and a member of the American Physical Society
LOCATION:CE 1 5 https://plan.epfl.ch/?room==CE%201%205
STATUS:CONFIRMED
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