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Time-Resolved soft X-ray Microscopy of Magnetic Nanostructures at the P04 Beamline of PETRA III

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  • معلومة اضافية
    • الموضوع:
      2014
    • Collection:
      DESY Publication Database (PUBDB)
    • الموضوع:
    • نبذة مختصرة :
      Picosecond magnetization dynamics of small permalloy (Ni80Fe20) elements has been investigated with a new full-field transmission microscope at the soft X-ray beamline P04 of the high brilliance synchrotron radiation source PETRA III.The soft X-ray microscope generates a flat-top illumination field of 20 µm diameter using a grating condenser. A tilted nanostructured magnetic sample can be excited either by making use of a mobile synchronized femtosecond laser system or by a picosecond electric current pulse via a coplanar waveguide. The transmitted light of the sample plane is directly imaged by a micro zone plate with < 65 nm resolution onto a 2D gateable X-ray detector to select one particular bunch in the storage ring that probes the time evolution of the dynamic information successively via XMCD spectromicroscopy in a pump-probe scheme.In the experiments it was possible to generate a homogeneously magnetized state in patterned magnetic layers by a strong magnetic Oersted field pulse and directly observe the destruction and recovery of the initial flux-closure vortex domain patterns. On the rising edge of the magnetic field pulse, high velocities of a central vortex core were discovered exceeding 1 km/s.
    • Relation:
      https://bib-pubdb1.desy.de/record/205422; https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04820%22
    • الدخول الالكتروني :
      https://bib-pubdb1.desy.de/record/205422
      https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2014-04820%22
    • Rights:
      info:eu-repo/semantics/openAccess
    • الرقم المعرف:
      edsbas.90DFC9B4