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REFERENCES: |
    A. R. Johnston.
    Dispersion of electro‐optic effect in BaTiO<sub>3</sub>.
    <a href="https://doi.org/10.1063/1.1660761"><i>J. Appl. Phys.</i> <b>42</b>, 3501-3507 (1971)</a>
COMMENTS: |
    Crystalline BaTiO<sub>3</sub>. Unclamped (low frequency) measurements.
DATA:
  - type: formula 1
    wavelength_range: 0.4 1.0
    coefficients: 0 1.6860 0.2799 2.6110 0.1377