Imaging magnetic structures with a transmission X-ray microscope

Fischer, P.; Eimu¨ller, T.; Schu¨tz, G.; Guttmann, P.; Schmahl, G.; Bayreuther, G.
May 2000
AIP Conference Proceedings;2000, Vol. 507 Issue 1, p205
Academic Journal
The X-ray magnetic circular dichroism (X-MCD), i.e. the dependence of the absorption of circularly polarized X-rays on the magnetization of the absorber exhibits at Ledges of transition metals values up to 25%. This can serve as a huge magnetic contrast mechanism in combination with a transmission X-ray microscope (TXM) to image magnetic domains providing a lateral resolution down to about 30nm The inherent element-specificity, the possibility to record images in varying external fields within a complete hysteresis loop, the relation of the contrast to local magnetic spin and orbital moments, etc. demonstrate the unique applicability to study the magnetic domain structure in current technical relevant systems like magneto-optics for high density storage media, multilayers for GMR applications or nanostructures for MRAM technology.


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