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Nanocrystalline Pr_2Fe_{17} and Nd_2Fe_{17} powders with rhombohedral Th_2Zn_{17}-type crystal structure and average particle sizes around 20 nm have been obtained by high-energy ball milling. While the bulk alloys show a well-defined and sharp drop in the low-field magnetization curve at the Curie temperature, T_{C} = 285 K (Pr) and 335 K (Nd), the ball-milled samples exhibit a substantial broadening...
The basic properties of magnetism depend strongly on the spin and orbital components of magnetization. Information about the magnetic moments can be gained using new techniques, like X-ray magnetic circular dichroism or Compton scattering, developed at third-generation synchrotron sources. After a brief introduction to the basic principles of these new magnetic tools, examples of experiments on 5f-electron...
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