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Related Concept Videos

Ferromagnetism01:31

Ferromagnetism

Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
Ferrocement01:30

Ferrocement

Ferro-cement is a distinctive construction material that represents an innovative variant of reinforced concrete, characterized by its unique composition and the method by which it is formed. Unlike standard reinforced concrete, which relies on larger steel bars for reinforcement, ferro-cement utilizes densely packed layers of mesh or fine rods, fully encased in cement mortar. This composition allows for the creation of structures that are significantly thinner and more flexible than their...
Eddy Currents01:25

Eddy Currents

Since eddy currents occur only in conductors, magnets can separate metals from other materials. For example, in a recycling center, trash is dumped in batches down a ramp, beneath which lies a powerful magnet. Conductors in the trash are slowed by eddy currents, while nonmetals in the trash move on, separating from the metals. This works for all metals, not just ferromagnetic ones.
Other major applications of eddy currents appear in metal detectors and the braking systems of trains and roller...
Microbes and Other Elemental Cycles01:24

Microbes and Other Elemental Cycles

Microbial activity plays a pivotal role in the biogeochemical cycling of iron and manganese, especially at the redox gradients characteristic of stratified aquatic environments. These cycles are driven by microbial transformations between oxidized and reduced forms of the metals, allowing organisms to exploit them for metabolic energy and structural purposes.Iron Cycling Across Redox GradientsIn neutral, oxygen-rich surface waters, iron is predominantly found in its oxidized, insoluble ferric...

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Related Experiment Video

Updated: Jul 5, 2026

A Fabrication and Measurement Method for a Flexible Ferroelectric Element Based on Van Der Waals Heteroepitaxy
10:40

A Fabrication and Measurement Method for a Flexible Ferroelectric Element Based on Van Der Waals Heteroepitaxy

Published on: April 8, 2018

Organic ferroelectrics.

Sachio Horiuchi1, Yoshinori Tokura

  • 1Correlated Electron Research Center, National Institute of Advanced Industrial Science and Technology, Tsukuba, 305-8562, Japan. s-horiuchi@aist.go.jp

Nature Materials
|April 25, 2008
PubMed
Summary

Researchers are developing new organic ferroelectric materials for advanced applications. These novel multi-component compounds exhibit promising ferroelectric properties near room temperature, expanding possibilities for functional organic electronics.

Area of Science:

  • Solid-state physics and materials science.
  • Organic electronics and functional materials.

Background:

  • Ferroelectricity is a key solid-state phase transition with significant technical applications.
  • Organic ferroelectrics have historically been limited to polymers and few low-molecular-mass compounds.
  • Traditional dipolar molecules have shown limited success in achieving general ferroelectricity.

Purpose of the Study:

  • To review advances in synthesizing new organic materials with ferroelectric properties.
  • To explore design principles for organic ferroelectrics analogous to inorganic compounds.
  • To highlight the potential of multi-component molecular compounds for functional organics.

Main Methods:

  • Reviewing recent synthesis strategies for organic ferroelectric materials.

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  • Applying design principles inspired by inorganic ferroelectric compounds.
  • Investigating multi-component systems based on non-covalent interactions.

    • Main Results:

    • Development of new organic materials exhibiting promising ferroelectric properties near room temperature.
    • Ferroelectricity achieved through molecular displacements or collective electron/proton transfer in multi-component systems.
    • Demonstration of broader design flexibility using multi-component molecular compounds.

    Conclusions:

    • Multi-component molecular compounds offer a versatile platform for designing organic ferroelectrics.
    • These materials hold significant potential for future functional organic electronic devices.
    • Advances in synthesis open new avenues for room-temperature organic ferroelectricity.