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UID:DSC-19768
DTSTART;TZID=Europe/Berlin:20230612T145000
SEQUENCE:1686548274
TRANSP:OPAQUE
DTEND;TZID=Europe/Berlin:20230612T162000
URL:https://www.dresden-science-calendar.de/calendar/de/detail/19768
LOCATION:TUD\,    
SUMMARY:Thomas: In-situ Correlation of Electrical (Magneto-) Transport Effe
 cts with Magnetic Textures in a Transmission Electron Microscope
CLASS:PUBLIC
DESCRIPTION:Speaker: Andy Thomas\nInstitute of Speaker: TU Dresden\nTopics:
 \nPhysik\n Location:\n  Name: TUD (REC/C213)\n  Street:   \n  City:  \n  P
 hone: \n  Fax: \nDescription: <p><strong>Abstract: </strong></p>  <p>Spint
 ronics naturally relates magnetic phenomena to transport properties. For e
 xample\, magnetometry measurements are used as an input parameter to expla
 in the anomalous Hall effect. Recently\, magnetic textures such as Skyrmio
 ns were related to intriguing transport observations such as the topologic
 al Hall effect. However\, the stability of magnetic textures depends on th
 e sample geometry\, therefore\, a correlation of magneto-transport and tra
 nsmission electron microscopy (TEM) data is challenging\, if not conducted
  on identical samples. To overcome this\, we devised a measurement platfor
 m that allows for the conduction of magneto-transport measurements while s
 imultaneously performing Lorentz-TEM (L-TEM) investigations. A special hol
 der is used to measure transport data. Hall bar structures are prepared us
 ing conventional lithography on thin film samples or TEM lamellae cut from
  single crystals placed on a measurement chip with a SixN window. In Loren
 tz mode\, the objective lens of the microscope applied a magnetic field pe
 rpendicular to the sample plane. Acquisition of L-TEM images and the Hall 
 voltage as function of the magnetic field were conducted automatically. Ou
 r setup allows us to follow the field dependence of the Hall voltage while
  simultaneously monitoring the magnetic texture. First\, we will present t
 hin film Nickel samples demonstrating the general functionality of the set
 up. Then\, we will present our experiments of the Heusler compound Mn1.4Pt
 Sn: On the one hand\, this material is known to host interesting magnetic 
 textures such as a helical phase\, non-topological bubbles and anti-skyrmi
 ons. On the other hand\, spintronic transport experiments in this material
  class already revealed fascinating features in the Hall signal attributed
  to the topological Hall effect. Our setup allows for the direct correlati
 on of the Hall effect with the magnetic field dependent occurrence of both
  non-topological (NT) and topologically protected magnetic phases.</p>  <p
 ><strong>BigBlueButton:</strong> https://bbb.tu-dresden.de/b/dar-mbs-me8-g
 sc (https://bbb.tu-dresden.de/b/dar-mbs-me8-gsc)</p>
DTSTAMP:20260917T084516Z
CREATED:20230406T053657Z
LAST-MODIFIED:20230612T053754Z
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