| Partner: G.S. Mityurich |
Ostatnie publikacje
| 1. | Mityurich G.S.♦, Aleksiejuk M., Ranachowski P., Pelivanov I.M.♦, Serdyukov A.N.♦, Photoacoustic diagnostics of inhomogeneous gyrotropic materials with internal stress using bessel light beams, ARCHIVES OF METALLURGY AND MATERIALS, ISSN: 1733-3490, DOI: 10.2478/v10172-011-0141-6, Vol.56, No.4, pp.1235-1242, 2011 Streszczenie: This paper considers the investigation of photoacoustic transformation in naturally-gyrotropic and magnetoactive crystals, with internal stress under sound excitation in different modes by Bessel light beams (BLB). In the range of high modulation frequencies (Ω > 1 MHz), the dependence of the photoacoustic response amplitude on the radial coordinate ρ exhibits resonant phenomenon, which can be used to increase the resolution of photoacoustic spectroscopy for media with internal stresses. The expressions for amplitudes of photoacoustic signals in strained crystalline samples were obtained under different boundary conditions, taking into account the dependence of the thermoelastic coupling coefficient on the initial strain in the sample. It was showed that a resonant increase in the amplitude signal is related to the dependence on the geometric parameters of the sample-piezoelectric transducer system, the values of Murnagan constants, the mode composition of the Bessel light beam, and its amplitude modulation frequency. Słowa kluczowe: photoacoustic spectroscopy, Bessel light beams, magnetoactive gyrotropic materials Afiliacje autorów:
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| 2. | Mityurich G.S.♦, Aleksiejuk M., Astakhov P.V.♦, Serdyukov A.N.♦, Laser photoacoustic spectroscopy of the piezoceramic materials, ARCHIVES OF METALLURGY AND MATERIALS, ISSN: 1733-3490, Vol.54, No.4, pp.889-894, 2009 | | 20p. | |||||||||||||||
| 3. | Astakhov P.V.♦, Aleksiejuk M., Emelyanovich A.N.♦, Mityurich G.S.♦, Laser photodeflection spectroscopy of the cylindrical samples absorbing modulated radiation with Bessel distribution of intensity, PRACE KOMISJI NAUK CERAMICZNYCH - POLSKI BIULETYN CERAMICZNY. CERAMIKA, ISSN: 0860-3340, Vol.101, pp.11-16, 2007 | |||||||||||||||||
| 4. | Aleksiejuk M., Astakhov P.V.♦, Emelyanovich A.N.♦, Mityurich G.S.♦, Excitation of photodeflective signal in non-uniform structures using bessel light beams, PRACE KOMISJI NAUK CERAMICZNYCH - POLSKI BIULETYN CERAMICZNY. CERAMIKA, ISSN: 0860-3340, Vol.89, pp.32-38, 2005 | |||||||||||||||||
| 5. | Mityurich G.S.♦, Astakhov P.V.♦, Ranachowski J., Motylewski J., Investigation of Magnetic Fluids by the Method of Photodeflection Spectroscopy, Prace IPPT - IFTR Reports, ISSN: 2299-3657, No.28, pp.1-23, 1995 | |||||||||||||||||
| 6. | Mityurich G.S.♦, Starodubtsev E.G.♦, Ranachowski J., Motylewski J., Account of Evaporation in Photoacoustical Spectroscopy of Condensed Media, Prace IPPT - IFTR Reports, ISSN: 2299-3657, No.35, pp.1-9, 1995 | |||||||||||||||||
| 7. | Starodubtsev E.G.♦, Mityurich G.S.♦, Ranachowski J., Electromagnetic Wave s and Photoacoustic Transformation in Gyrotropic Superlattices, Prace IPPT - IFTR Reports, ISSN: 2299-3657, No.36, pp.1-29, 1994 | |||||||||||||||||
| 8. | Mityurich G.S.♦, Motylewski J., Ranachowski J., Modern Photoacoustic Spectroscopy Problems Theory and Experiment (a Review), Prace IPPT - IFTR Reports, ISSN: 2299-3657, No.41, pp.1-164, 1993 |