X-ray Capabilities at APS

Advisory Committee

Workshop Home


Workshop Chairs:
Sam Bader
(Argonne National Laboratory)
Laura Lewis
(Brookhaven National Laboratory)
George Srajer
(Advanced Photon Source)


Workshop on Nanomagnetism Using X-ray Techniques

August 29 September 1, 2004, The Abbey, Fontana, Lake Geneva Area, Wisconsin


Confinement and finite-size effects alter magnetic properties which makes nanomagnetic materials very attractive for new applications, such as spintronics devices. Hence, it is of paramount importance to understand the magnetic behavior of individual building blocks, which are combined into more complex structures leading to devices with new functionalities. In addition to technological relevance, there are many exciting basic science questions which comprises of understanding the magnetic interactions at surfaces, interfaces, and in reduced dimensions in general as in ultra thin films, atomic and molecular chains, quantum wires and dots, ad atoms, and small atomic or molecular clusters. Recently, investigations using the x–rays techniques at the synchrotron radiation facilities have contributed to a deeper understanding of the microscopic behavior of nanomagnetic materials. This includes the study of induced magnetism at interfaces, structural and magnetic roughness, magnetic interactions in artificially structured heterostructures, and depth-resolved magnetic structures in multilayers.

Several techniques such as circular magnetic x-ray dichroism, magnetic microscopy, spin-polarized photoemission, magnetic x-ray absorption fine structure, nuclear resonant scattering and magnetic resonant x-ray scattering are currently being applied to investigate nanomagnetic systems. However, it is no exaggeration that the application of the x-ray tools to the study of nanomagnetic materials is at its infancy. How these techniques could evolve to meet new challenges in the future is the most important question that this workshop shall address. Hence it is very timely to hold a workshop to explore the scientific opportunities in this field.

The purpose of this workshop was to explore emerging scientific opportunities in the field of nanomagnetism using x-ray techniques, and to seek input from specialist in the nanomagnetism field to define the most important problems in the field. The Workshop assessed the current state of nanomagnetism and addressed future challenges. In particular, the emphasis was on the role of synchrotron radiation techniques in solving important problems in the field.

The workshop included plenary and topical presentations. The plenary talks were science overviews and the topical presentations were in the area of:
  1. Molecular magnets
  2. Laterally confined structures
  3. Nanoscale Phase Separated Systems