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A study of the x-ray focusing effect of a magnetoacoustically excited crystal using synchrotron radiation diffraction imaging
| Content Provider | Scilit |
|---|---|
| Author | Matsouli, Ioanna Kvardakov, Vladimir Espeso, Jose Ignacio Chabert, Laurent Baruchel, José |
| Copyright Year | 1998 |
| Description | Journal: Journal of Physics D: Applied Physics Ultrasonic standing waves, excited in an (111) crystal through magnetoelastic coupling, are visualized using synchrotron radiation diffraction imaging (`topography'). This observation relies on the possibility at the ESRF of recording images with long sample-to-film propagation distances (up to 1.5 m) without substantial loss of resolution. The crystal acts as an x-ray focusing lens periodically in time, an effect that strongly depends both on the amplitude of the magnetic field excitation and on the propagation distance. The standing-wave-related contrast is hardly visible close to the sample, very sharp for a focusing distance (typically ) whereas beyond this position the intensity maxima broaden due to the defocusing effect. We propose a model which accounts for the presented results, allows the understanding of the details of the resonance patterns and gives access to the main characteristics of the vibration: amplitude, shape, polarization, wavelength and sound velocity. This effect could be used to simultaneously monochromatize and focus the x-ray beam simultaneously. |
| Related Links | http://iopscience.iop.org/article/10.1088/0022-3727/31/12/012/pdf |
| Ending Page | 1486 |
| Page Count | 9 |
| Starting Page | 1478 |
| ISSN | 00223727 |
| e-ISSN | 13616463 |
| DOI | 10.1088/0022-3727/31/12/012 |
| Journal | Journal of Physics D: Applied Physics |
| Issue Number | 12 |
| Volume Number | 31 |
| Language | English |
| Publisher | IOP Publishing |
| Publisher Date | 1998-06-21 |
| Access Restriction | Open |
| Subject Keyword | Journal: Journal of Physics D: Applied Physics Magnetic Field Standing Wave Synchrotron Radiation |
| Content Type | Text |
| Resource Type | Article |
| Subject | Surfaces, Coatings and Films Acoustics and Ultrasonics Condensed Matter Physics Electronic, Optical and Magnetic Materials |
