Abstract
Considering external electric field as well as third- and fourth-order phonon anharmonic interaction terms in the pseudospin-lattice coupled mode (PLCM) model Hamiltonian for KDP-type ferroelectrics, expressions for field-dependent shift, width, renormalized soft mode frequency, Curie temperature, dielectric constant and dielectric loss are evaluated. For the calculation, method of statistical double-time temperature-dependent Green’s function has been used. By fitting model values of physical quantities, temperature and electric field dependences of soft mode frequency, dielectric constant and loss have been calculated which compare well with experimental results of Baumgartner [8] and Choi and Lockwood [9]. Both dielectric constant and loss decrease with electric field.
References
H V Tiwari and G K Tiwari, Proc. National Seminar on Ferroelectrics and Dielectrics, Nagpur Univ., Oct. 23–25 (1994) pp. 41–51
S K Sharma, CAT News Letter (India) Jan. p4 L 7 (2004)
R Blinc and B Zeks, Adv. Phys. 29, 693 (1972)
P G De Gennes, Solid. State Commun. 1, 132 (1963)
J B Zhang and Z K Qin, Phys. Rev. A36, 915 (1987)
W Cochran, Adv. Phys. 18, 157 (1969)
E Litov and C W Garland, Ferroelectrics 72, 12 (1987)
H Baumgartner, Helv. Phys. Acta 24, 650 (1950)
B K Choi and D J Lockwood, Ferroelectrics 106, 15 (1990)
S Ganguli, D Nath and B K Chaudhuri, Phys. Rev. B21, 2937 (1980)
V M Kedyulich, A G Livka, E I Gerzamich, A M Guivan and Lucach, Condens. Matter Phys. 6, 271 (2003)
I V Stasyuk, R R Levistkii, I R Zachek and A S Duda, Condens. Matter Phys. 4, 553 (2001)
K Wada, K Yoshida and N Ihara, J. Phys. Soc. Jpn. 70, 1019 (2001)
S J Reeuwijk, A P Monia and H Graafsma, Phys. Rev. B62, 6192 (2000-II)
S Koval, J Kohanoff, R L Migoni and E Tosatti, Phys. Rev. Lett. 89, 197602–1 (2002)
E Nakamura and K Kuramoto, J. Phys. Soc. Jpn. 57, 2182 (1988)
R R Leviskii, A G Slivka, A P Moina, P M Lukach and A M Guivan, J. Phys. Studies 6, 197 (2002)
S Vyazovkin and T L Ferrin, Solid State Commun. 113, 627 (2000)
S V Grabovskii, I V Shnaidshtein and E V Chuprunov, Crystallogr. Rep. 48, 335 (2003)
E D Yakushkin, E P Efremova and A I Baranov, Crystallogr. Rep. 46, 830 (2001)
T C Upadhyay and B S Semwal, Ind. J. Pure Appl. Phys. 40, 615 (2002)
D N Zubarev, Sov. Phys. Usp. 3, 320 (1960)
M Born and K Huang, Dynamical theory of crystal lattices (Oxford Press, New York, 1954)
R J Kubo, Phys. Soc. Jpn. 12, 570 (1957)
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Upadhyay, T.C., Bhandari, R.S. & Semwal, B.S. Dielectric properties of KDP-type ferroelectric crystals in the presence of external electric field. Pramana - J Phys 67, 547–552 (2006). https://doi.org/10.1007/s12043-006-0016-y
Received:
Revised:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/s12043-006-0016-y