Abstract's Details

Watching Nanomagnets Switch
Abstract ID	W:IMG-07
Presenter	Stefan Eisebitt
Presentation Type	Imaging Workshop
Full Author List	S. Eisebitt (1)
Affiliations	(1) BESSY
Category	Instrumentation/Development
Abstract	X-ray holography allows us to image nanostructures in a coherent x-ray scattering experiment. This is achieved by monolithically coupling a suitable reference scatterer to the object to be imaged. As a result, a Fourier Transform Hologram can be recorded, which can be inverted into an image by a single Fourier Transformation.[1] By combining unambiguous holographic imaging with x-ray magnetic dichroism, we are able to study the switching behavior of nanomagnets in external magnetic fields.[2] Here, a study in the context of the development of patterned perpendicular magnetic storage media is presented as an example. New technique developments such as reference and object multiplexing are discussed, which allow to expand the field of view and to study large arrays of samples with high sensitivity and resolution during the same exposure.[3,4] While this work was carried out at BESSY II, i.e. on a storage ring, the holographic approach will benefit tremendously from high brightness sources in general and FEL x-ray sources in particular. The resulting future perspectives for femtosecond time resolved imaging experiments are discussed.
Footnotes	[1] S. Eisebitt et al, Nature, 432, 885 (2004) [2] O. Hellwig et al, J. Appl. Phys. 99, 08H307 (2006) [3] W. F. Schlotter et al, Applied Physics Letters 89 (2006) [4] W. F. Schlotter et al, Optics Letters, in press (2007)
Funding Acknowledgement