X-ray diffraction analysis of the surface acoustic wave propagation in langatate crystal |
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Authors: | D V Roshchupkin A I Erko L Ortega and D V Irzhak |
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Institution: | (1) Institute of Microelectronics Technology RAS, 142432 Chernogolovka, Russia;(2) BESSY GmbH, Albert-Einstein Strasse 15, 12489 Berlin, Germany;(3) Institut Néel CNRS, 25 Rue des Martyrs, BP 166, 38042 Grenoble cedex 09, France |
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Abstract: | X-ray diffraction on a langatate crystal (La3Ga5.5Ta0.5O14, LGT) modulated by a Λ=12 μm Rayleigh surface acoustic wave (SAW) was studied in a double axis X-ray diffractometer scheme at the BESSY synchrotron
radiation source. SAW propagation in the crystal causes sinusoidal modulation of the crystal lattice and the appearance of
diffraction satellites on the rocking curves, with their number, angular positions, and intensities depending on the wavelength
and amplitude of acoustic vibrations of the crystal lattice. Strong absorption of X-ray radiation in LGT enables the observation
of the diffraction spectra extinction at certain SAW amplitudes. X-ray diffraction spectra analysis makes it possible to determine
SAW amplitudes and wavelengths, to measure the power flow angles, and investigate the diffraction divergence in acoustic beam
in LGT. |
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Keywords: | PACS" target="_blank">PACS 61 05 cp 77 65 Dq |
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