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Rare-earth-modified Sr0.5Ba0.5Nb2O6, ferroelectric crystals and their applications as infrared detectors

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Abstract

Rare-earth-modified ferroelectric crystals with the formula (Sr1−xBax)1− 3y/2 RyNb22O6, where R = La, Nd, Sm, Gd, and Lu, have Been prepared and studied. When R = La, Nd, x ≃ .5 and y = 0.02, the modified material, at room temperature, exhibited twice the pyroelectric coefficient and four times the dielectric constant of the unmodified Sr1−xBaxNb2O6 (x ≃ .5). Curie temperatures decreased, dielectric constants increased, while loss factor and detector signal-to-noise ratios remained nearly the same with the addition of rare earth doping. The calculated response based on the measured properties agree with the measured response of actual detectors. These properties suggested that the modified SBN are good materials for small element or array pyroelectric infrared detector applications.

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Authors and Affiliations

  1. Honeywell Corporate Research Center, 55420, Bloomington, Minnesota

    S. T. Liu & R. B. Maciolek

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  1. S. T. Liu
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  2. R. B. Maciolek
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Liu, S.T., Maciolek, R.B. Rare-earth-modified Sr0.5Ba0.5Nb2O6, ferroelectric crystals and their applications as infrared detectors. J. Electron. Mater. 4, 91–100 (1975). https://doi.org/10.1007/BF02657838

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  • DOI: https://doi.org/10.1007/BF02657838

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