J. Phys. Soc. Jpn. 56 (1987) pp. 757-767  |Next Article|  |Table of Contents|
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Optical and X-Ray Studies of Domain Formation in KH₂PO₄ Crystal

Kohji Abe

(Received August 27, 1986)

The domain formation in KDP crystal has been investigated with optical observation and X-ray measurement under various conditions. It is found that the relation between the thickness d and the domain width w of c-plate crystals under nonelectroded conditions does not follow the well-known square-root law. In the region of d<1 mm, w obeys the relation w=a+√a²+bd, whereas in the region of d≥1 mm, w is practically constant. In order to explain this result a domain formation model is proposed based on the spinodal decomposition with an interaction between the domain walls. The X-ray measurement reveals that the angle between the domain walls with (100) and (010) orientations is deviated slightly from 90° in the specimen eliminating the depolarizing field. This deviation is satisfactorily interpreted with the unequal volume fractions of positive and negative domains. ©1987 The Physical Society of Japan

URL: http://jpsj.ipap.jp/link?JPSJ/56/757/
DOI: 10.1143/JPSJ.56.757

References | Citing Articles (4)

1. T. Mitsui and J. Furuichi: Phys. Rev. 90 (1953) 193[APS].
2. A. Fouskova, P. Guyon and J. Lajzerowicz: CR. Acad. Sci. 262 (1966) 907.
3. J. Bornarel and J. Lajzerowicz: J. Appl. Phys. 39 (1968) 4339[AIP Scitation].
4. J. Fousek and M. Safrankova: Jpn. J. Appl. Phys. 4 (1965) 403[IPAP].
5. J. Bornarel and J. F. Legrand: Ferroelectrics 39 (1981) 1127.
6. A. P. Levanyuk and D. G. Sannikov: Sov. Phys.-JETP 28 (1969) 134.
7. B. V. Selyuk: Sov. Phys.-Crystallogr. 16 (1971) 292.
8. E. V. Chenskii: Sov. Phys.-Solid State 14 (1973) 1940.
9. G. Busch and P. Scherrer: Naturwiss. 23 (1935) 737.
10. S. Toshev: Proc. Int. Meet. Ferroelectricity, Pragure (1966) Vol. II, p. 3.
11. E. Nakamura, S. Ushio and K. Abe: J. Phys. Soc. Jpn. 53 (1983) 403[IPAP].
12. O. P. Aleshko-Ozhevskii: Sov. Phys.-Crystallogr. 27 (1982) 673.
13. W. Kanzig: Solid State Phys. (Academic Press, New York, 1957) Vol. 4, p. 107.
14. C. Belouet, E. Dunia and J. F. Petroff: J. Cryst. Growth 23 (1974) 243[Elsevier].
15. K. Kuramoto, H. Motegi, E. Nakamura and Y. Kaneishi: Proc. 6th Int. Conf. Ferroelectricity, Kobe, 1985, Jpn. J. Appl. Phys. 24 (1985) Suppl. 24–2, p. 562[IPAP].
16. C. Kittel: Phys. Rev. 70 (1964) 965[APS].
17. C. Kittel: Rev. Mod. Phys. 21 (1949) 541[APS].
18. J. W. Cahn: Acta Metall. 9 (1961) 795.
19. J. W. Cahn: J. Chem. Phys. 42 (1965) 93[AIP Scitation].
20. J. W. Cahn and J. E. Hilliard: J. Chem. Phys. 28 (1958) 258[AIP Scitation].
21. M. de Quervain: Helv. Phys. Acta 17 (1944) 509.