| 1. | Ionic polarization causes the ferroelectric effect as well as dipolar polarization.
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| 2. | In particular, ice XV is ferroelectric as had been predicted.
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| 3. | Ferroelectric crystals often show several transition temperatures and ferromagnetic crystals.
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| 4. | Ferroelectric liquid crystals are used in production of reflective LCoS.
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| 5. | Ferroelectric, dielectric ( paraelectric ) and piezoelectric materials have electric polarisation.
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| 6. | All ferroelectric materials are pyroelectric and piezoelectric, but not the converse.
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| 7. | A ) Ferroelectric soft-mode frequency as a function of temperature.
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| 8. | Ferroelectric materials are required by symmetry considerations to be also piezoelectric and pyroelectric.
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| 9. | Among pyroelectric materials, some of them are ferroelectric.
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| 10. | Materials are only ferroelectric below their corresponding transition temperature.
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