Absolute sense of pyroelectric p3 and piezoelectric d33 coefficients in 3La (IO3)3.HIO3.7H2O |
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Authors: | SC Abrahams JL Bernstein |
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Institution: | Bell Laboratories Murray Hill, New Jersey 07974, USA |
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Abstract: | The pyroelectric coefficient p3 in 3La(IO3)3.HIO3.7H2O has an average value 2.0×10-5 Cm-2 in the temperature range 152 to 240 K. The resistivity decreases from 1012 to 1010 ohm-cm between 258 and 338 K. At 298 K, the piezoelectric coefficient d33 19×10-12CN-1. Positive polarity is generated on (001) by increasing temperature or tensile stress. A displacement toward (001) by La3+ or H3O+ ions of 1×10-4 Å per K or 106Nm-2, or rotation of the water molecule or iodate ion dipoles by about 5 arc minutes per K or 106Nm-2, produces the observed polarity. |
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