Time-resolved hard x-ray magnetic microprobe at SPring-8

Motohiro Suzuki, Naomi Kawamura, Hitoshi Osawa, Masafumi Takagaki, Kanta Ono, Toshiaki Taniuchi, Shinji Isogami, Masakiyo Tsunoda

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

An instrument for hard X-ray magnetometry with spatial and time resolutions of 400-ps and sub-2-μm was developed at BL39XU, SPring-8.The technique is based on X-ray magnetic circular dichroism measurements combined with KB focusing mirrors and a fast current source, which generates a pulsed magnetic field of 400-ps duration that is synchronized with the X-ray pulses provided from the storage ring in the 203-bunch operation (42 MHz) with a jitter of 50 ps. By fully using the bulk-sensitivity and element-specificity of hard X-ray dichroism, we have demonstrated that the magnetization reversing process in the nanosecond time scale of the free NiFe and pinned CoFeB/CoFe layers were separated in a 10-μm dot sample with a NiFe/MgO/CoFeB/CoFe/MgO structure mimicking a magnetic tunnel junction device.

Original languageEnglish
Title of host publicationSRI 2009 - The 10th International Conference on Synchrotron Radiation Instrumentation
Pages129-132
Number of pages4
DOIs
Publication statusPublished - 2010 Aug 3
Event10th International Conference on Synchrotron Radiation Instrumentation, SRI 2009 - Melbourne, VIC, Australia
Duration: 2009 Sep 272009 Oct 2

Publication series

NameAIP Conference Proceedings
Volume1234
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other10th International Conference on Synchrotron Radiation Instrumentation, SRI 2009
CountryAustralia
CityMelbourne, VIC
Period09/9/2709/10/2

Keywords

  • Magnetic circular dichroism
  • magnetization dynamics
  • magnetometry
  • microscopy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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