Dielectric properties of PbNb{sub 2}O{sub 6} ferroelectric ceramics at cryogenic temperatures

Journal Article · Mon Aug 06 00:00:00 EDT 2007 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.2769765· OSTI ID:21016091

Guerra, J de los S; Venet, M; Garcia, D; Eiras, J A; Guerrero, F ^[1]

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1. Grupo de Ceramicas Ferroeletricas, Departamento de Fisica, Universidade Federal de Sao Carlos, CEP 13565-905, Sao Carlos, Sao Paulo 15385000 (Brazil)

Complex dielectric permittivity measurements in PbNb{sub 2}O{sub 6} ceramics were performed in a frequency and temperature range of 1 kHz-1 MHz and from 15 to 900 K, respectively. The results revealed two dielectric anomalies showing typical characteristics of relaxor ferroelectric materials at cryogenic temperatures. Comparison with other tetragonal tungsten bronze (TTB) structure-type materials suggests the existence of successive phase transitions, which until now were not reported. The observed low temperature dielectric behaviors seem to be due to intrinsic physical characteristics related to the TTB structure.

• OSTI ID: 21016091
• Journal Information: Applied Physics Letters, Vol. 91, Issue 6; Other Information: DOI: 10.1063/1.2769765; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CERAMICS
CRYOGENICS
FERROELECTRIC MATERIALS
KHZ RANGE
LEAD COMPOUNDS
NIOBATES
PERMITTIVITY
PHASE TRANSFORMATIONS
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0013-0065 K
TEMPERATURE RANGE 0065-0273 K
TEMPERATURE RANGE 0273-0400 K
TEMPERATURE RANGE 0400-1000 K
TUNGSTEN BRONZE