On the theory of X-ray diffraction by surface acoustic waves

Coherent and diffuse X-ray scattering in crystals modulated by a surface acoustic wave

“…To the best of our knowledge, all previously developed theories describing the interaction of X-rays with ultrasound, including X-ray diffraction in the volume of the sample (Kö hler et al, 1974;Entin, 1988) and on its surface (Gabrielyan & Aslanian, 1988;Polikarpov et al, 1998;Schelokov et al, 2004), are restricted to the case of ideal (defect free) crystals. Furthermore, there is still no theory of X-ray diffraction in crystals modulated by a SAW, applicable to a high-resolution triple-crystal diffractometer (Iida & Kohra, 1979;Nesterets & Punegov, 2000).…”

Effect of the ultrasonic frequency on the multiple X-ray scattering from a LiNbO3 crystal modulated by a surface acoustic wave

“…The specific features of SAW propagation in solids were monitored by X ray topography [3][4][5], grazing X ray diffraction [6,7], and double and triple crystal X ray diffraction [8][9][10][11][12][13][14][15][16][17]. Various effects accompanying X ray scattering in SAW modulated crystals were described in terms of the dynamical [11][12]18] and kinematical [10,13,19] diffraction theories. High resolution triple crystal X ray diffraction [13][14][15][16][17] allows one to measure 2D reciprocal space maps.…”

“…In these crystals the SAW ampli tude can be varied in a wide range (from zero to several angstroms) by changing the amplitude of the high fre quency electric signal applied to interdigital trans ducer (IDT). X ray diffraction, which is highly sensitive to lattice strain, is successfully used to study acoustic waves in near surface layers of crystals [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. The specific features of SAW propagation in solids were monitored by X ray topography [3][4][5], grazing X ray diffraction [6,7], and double and triple crystal X ray diffraction [8][9][10][11][12][13][14][15][16][17].…”