التفاصيل البيبلوغرافية
| العنوان: |
Soft X-Ray Magneto-Optics: Probing Magnetism by Resonant Scattering Experiments. |
| المؤلفون: |
Spezzani, Carlo, Popescu, Horia, Fortuna, Franck, Delaunay, Renaud, Breitwieser, Romain, Jaouen, Nicolas, Tortarolo, Marina, Eddrief, Mahmoud, Vidal, Franck, Etgens, Victor H., Marangolo, Massimiliano, Sacchi, Maurizio |
| المصدر: |
IEEE Transactions on Magnetics; Aug2013 Part 1, Vol. 49 Issue 8, p4711-4716, 6p |
| مصطلحات موضوعية: |
MAGNETOOPTICS, X-ray scattering, PHYSICS experiments, MAGNETIC flux, MAGNETIC domain, MAGNETIC resonance imaging, HOLOGRAPHY |
| مستخلص: |
The most advanced X-ray sources (third generation synchrotrons, linear free-electron lasers and high-harmonic generation sources) widen the range of application of X-ray scattering techniques considerably. Beyond flux and brilliance, improvements in polarization tuneability, degree of coherence and selectable time-structure promoted new methods for investigating the electronic and magnetic properties of solids. The soft X-ray range (50–2000 eV) is well suited for studying magneto-optical effects in laterally confined submicron sized objects, either artificially built or self-assembled. First, by tuning the photon energy at a core resonance, one provides the X-ray scattering technique with element selectivity. Second, resonant excitations make the optical constants sensitive to the local magnetization by introducing large off-diagonal elements in the dielectric tensor; since magnetic effects are stronger when the core excitation produces a dipolar transition to final states involving the magnetic orbitals (3d for the first row TM; 4f for RE), the most interesting resonances for X-ray magneto-optics [(2, 3)p \to 3 d and (3, 4)d \to 4 f] are all located in the soft X-ray region. Finally, the wavelengths corresponding to soft X-rays are very well suited for scattering studies of nanometer- to micrometer-sized magnetic structures. We will present the results of recent soft X-ray resonant scattering experiments, showing that the combination of element selectivity, magnetic sensitivity and structural analysis can help disentangling and understanding the magnetic properties of complex self-assembled periodic systems. Lastly, recent applications of coherent scattering to the X-ray holographic imaging of magnetic domains will be presented. [ABSTRACT FROM PUBLISHER] |
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| قاعدة البيانات: |
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