Ferroelectricity is a property which material of ferroelectrics has. The material has polarization that can be reversed by application of an external electric field. The polarization of the material in the state that an external electric field does not be applied to it is called spontaneous polarization or remanent/remnant polarization. Though pyroelectric material also has the spontaneous polarization, it has no ferroelectricity because polarity of the polarization cannot be reversed by an external electric field. The material with ferroelectricity combines pyroelectric and piezoelectric properties.

2 thoughts on “ferroelectricity”

    1. Bing AI said that:
      Ferroelectric materials have several unique properties and benefits:

      1. Spontaneous Electric Polarization: Ferroelectric materials have a spontaneous electric polarization that can be reversed by the application of an external electric field¹. This property is used in nonvolatile memories (NVMs), where two stable polarization states can be switched from one to another by applying an electrical field².

      2. Nonlinear Nature: The nonlinear nature of ferroelectric materials can be used to make capacitors with adjustable capacitance¹. The permittivity of ferroelectrics is not only adjustable but commonly also very high, especially when close to the phase transition temperature¹.

      3. Small Physical Size: Because of their high permittivity, ferroelectric capacitors are small in physical size compared to dielectric (non-tunable) capacitors of similar capacitance¹.

      4. Ferroelectric Liquid Crystals: Ferroelectric liquid crystals are used in the production of reflective Liquid Crystal on Silicon (LCoS)¹.

      5. Nonvolatile Memories: Ferroelectric materials are promising for realizing nonvolatile memories². The application of ferroelectrics in NVMs has been studied since the 1950s².

      6. Nanoelectronics: Ferroelectricity is being developed in the realm of ferroelectric-based nanoelectronics³.

      These properties make ferroelectric materials valuable in many areas of technology, including memory devices, capacitors, and nanoelectronics.

      ソース: Bing との会話 2023/12/18
      (1) Ferroelectricity – Wikipedia. https://en.wikipedia.org/wiki/Ferroelectricity.
      (2) The Past, the Present, and the Future of Ferroelectric Memories. https://ieeexplore.ieee.org/document/9032362/.
      (3) What is Ferroelectricity and How Does it Apply Nanotechnology?. https://www.azonano.com/article.aspx?ArticleID=6115.
      (4) Ferroelectric Materials and Its Applications | Electrical …. https://www.engineeringenotes.com/electrical-engineering/ferroelectric-materials/ferroelectric-materials-and-its-applications-electrical-engineering/42109.
      (5) undefined. https://ieeexplore.ieee.org/servlet/opac?punumber=16.

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