Investigation into the evolution of the structure of K{sub 1-x}Li{sub x}Ta{sub 1-y}Nb{sub y}O{sub 3} single crystals under variations in temperature

Journal Article · Tue May 15 00:00:00 EDT 2007 · Crystallography Reports

DOI:https://doi.org/10.1134/S1063774507030169· OSTI ID:21090919

Borisov, S A; Vakhrushev, S B; Koroleva, E Yu; Syrnikov, P P ^[1]; Simkin, V G ^[2]; Kutnjak, Z ^[3]; Egami, T; Dmowski, W ^[4]; Piekarz, P ^[5]

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1. Russian Academy of Sciences, Ioffe Physicotechnical Institute (Russian Federation)
2. Joint Institute for Nuclear Research (Russian Federation)
3. Jozef Stefan Institute (Slovenia)
4. University of Tennessee (United States)
5. Polish Academy of Sciences, Institute of Nuclear Physics (Poland)

The evolution of the structure of K{sub 1-x}Li{sub x}Ta{sub 1-y}Nb{sub y}O{sub 3} single crystals with x = 0.001, y = 0.026, and 1900 ppm Cu (KLTN277) and with x = 0.0014 and y = 0.024 (KLTN123), which exhibit an extremely high permittivity (up to 4 x 10{sup 5} in the quasi-static regime for the KLTN277 crystal), is investigated in the range from room temperature to 20 K. It is demonstrated that, upon cooling to the lowest temperatures, both crystals retain their cubic structure, but the lattice parameters pass through a minimum at the temperature of the observed anomalies of the dielectric response ({approx}50 K). In the neutron diffraction pattern of the KLTN123 sample, satellites appear in the vicinity of the (hhh) reflections at temperatures below {approx}50 K. These satellites can be associated with the nucleation of the rhombohedral phase.

• OSTI ID: 21090919
• Journal Information: Crystallography Reports, Vol. 52, Issue 3; Other Information: DOI: 10.1134/S1063774507030169; Copyright (c) 2007 Nauka/Interperiodica; Article Copyright (c) 2007 Pleiades Publishing, Inc; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7745
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COOLING
DIELECTRIC MATERIALS
LATTICE PARAMETERS
LITHIUM COMPOUNDS
MONOCRYSTALS
NEUTRON DIFFRACTION
NIOBIUM COMPOUNDS
NUCLEATION
OXIDES
PERMITTIVITY
POTASSIUM COMPOUNDS
TANTALUM COMPOUNDS
TEMPERATURE RANGE 0013-0065 K
TEMPERATURE RANGE 0273-0400 K