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Pyroelectricity of Ni-doped PMNT Ferroelectric for Pyroelectric Detector
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 Title & Authors
Pyroelectricity of Ni-doped PMNT Ferroelectric for Pyroelectric Detector
Kim, Yeon Jung;
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A pyroelctric properties of Ni(x)-doped PMNT systems were analyzed. Modified PMNT samples were prepared using the columbite structure method. Pyroelectric current, polarization, dielectric constant and dissipation factor of Ni-doped PMNT samples were measured as a function of temperature. By adding a small amount of NiO, pyroelectricity of PMNT is increased. Unlike the normal ferroelectric, Ni-doped PMNT showed properties for relaxor ferroelectric of causing the successive phase transition over a wide temperature. The optimum conditions for obtaining compositions with improvement ferroelectric properties are a nominal addition of 0.02 mole% Ni. Also, Ni-doped PMNT ferroelectric showed excellent pyroelectric figures of merit in the vicinity of room temperature. The pyroelectric coefficient ( at ) and figures of merit ( and ) of composition PMNT with 0.02 mole% Ni are comparable to the earlier reports on lead-type pyroelectrics.
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