Abstract
The influence of temperature gradient on the intensity of X-ray beam reflected from atomic planes of antiferroelectric crystal of ammonium dihydro-phosphate (ADP) was studied. It was found that under the influence of temperature gradient on ADP crystal, the intensity of diffracted X-ray beam initially decreases at small values of gradient and then monotonously increases with increasing gradient. It is assumed that in the initial period of the action of temperature gradient the crystal domains have no time to orient in the same direction, and the intensity of beam decreases owing to the scattering of X-rays in different directions when reflected from the walls of boundaries of domains. After the alignment of domains, their arrangement in the same direction, separate areas of unidirectional domains are formed under the action of temperature gradient and the intensity of diffracted X-ray beam increases, as confirm the experimental data. The specified mechanism is supposed to occur also in other crystals having the domain structure.
Similar content being viewed by others
References
Nechaev, V.N. and Roshchupkin, A.M., Izvestiya Akademii Nauk ArmSSR, Fizika, 1990, vol. 54, p. 637.
Nechaev, V.N. and Roshchupkin, A.M., Izvestiya Akademii Nauk ArmSSR, Fizika, 1989, vol. 53, p. 1267.
Fox, A.W. and Corr, P.H., Phys. Rev., 1931, vol. 37, p. 1622.
Nishikava, S., Sakisaka, I., and Sumoto, I., Phys. Rev., 1931, vol. 38, p. 1078.
Mkrtchyan A.R., Navasardyan M.A., and Mirzoyan V.Gh., Pis’ma v ZhTF, 1982, vol. 8, p. 677.
Mirzoyan, V.K. and Noreyan, S.N., Izvestiya Akademii Nauk ArmSSR, Fizika, 1991, vol. 26, p. 151.
Mirzoyan, V.Gh., Truni, K.G., Grigoryan, P.A., Gevorgyan, K.M., and Dezfouli, M.G., J. Contemp. Phys. (Armenian Ac. Sci.), 2014, vol. 49, p. 74.
Navasardyan, M.A. and Bezirganyan, P.A., Izvestiya Akademii Nauk ArmSSR, Fizika, 1973, vol. 8, p. 108.
Akusticheskie kristally (Acoustic Crystals), Shaskol’skaya, M.O., Ed., Moscow Nauka, 1982.
Sidorkin, A.S., Domennaya structura v segnetoelektrikakh i rodstvennykh materialakh (Domain Structure in Ferroelectrics and Related Materials), Moscow Fizmatlit, 2000.
Gridnev, S.A., Elektricheskie kristally (Electrical Crystals), Sorosowskii obrazovate’nyi zhurnal (Soros Educational Journal), 1996, vol. 7, p. 99.
Strukov, B.A. and Levanyuk, A.P., Fizicheskie osnovy segnetoelectricheskikh yavlenii v kristallakh (Physical Foundations of Ferroelectric Phenomena in Crystals), Moscow Fizmatlit, 1995.
Umanskii, Ya.S., Skakov, Tu.A., Ivanov, A.N., and Rastorguev, L.N., Kristallografiya, rentgenografiya i elektronnaya mikroskopiya (Crystallography, X-ray Radiography and Electron Microscopy), Moscow Metallurgiya, 1982.
Ivernova, V.I. and Revkevich, G.P., Teoriya rasseyaniya rentgenovskikh luchei (Theory of X-ray Scattering), Moscow University Publishers, 1978.
Author information
Authors and Affiliations
Corresponding author
Additional information
Original Russian Text © V.N. Aghabekyn, A.S. Hakobyan, P.A. Grigoryan, 2017, published in Izvestiya Natsional’noi Akademii Nauk Armenii, Fizika, 2017, Vol. 52, No. 2, pp. 227–234.
About this article
Cite this article
Aghabekyn, V.N., Hakobyan, A.S. & Grigoryan, P.A. Study of X-ray diffraction processes in ADP crystals under the influence of temperature gradient. J. Contemp. Phys. 52, 167–172 (2017). https://doi.org/10.3103/S1068337217020116
Received:
Published:
Issue Date:
DOI: https://doi.org/10.3103/S1068337217020116