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Related Concept Videos

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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...
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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...
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An important distinction exists between the electric field induced by a changing magnetic field and the electrostatic field produced by a fixed charge distribution. Specifically, the induced electric field is nonconservative because it does not work in moving a charge over a closed path. In contrast, the electrostatic field is conservative and does no net work over a closed path. Hence, electric potential can be associated with the electrostatic field but not the induced field. The following...
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Capacitor With A Dielectric01:18

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Parallel plate capacitors consist of two conducting plates separated by a certain distance. However, it is mechanically difficult to hold the large plates parallel to each other without actual contact. Hence, a dielectric layer is commonly placed between the plates, which provides an easy solution for holding the plates together with a small gap and increases the capacitance of the capacitor.
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Dielectric Polarization in a Capacitor01:31

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The presence of a dielectric medium in a capacitor not only changes the voltage and capacitance but also affects the electric field. In general, dielectrics can be of two types: polar and nonpolar. In a polar dielectric, the positive and negative charges in the molecules are separated by a distance and hence have a permanent dipole moment. In contrast, no such charge separation exists in a nonpolar dielectric, however the nonpolar molecules get polarized in the presence of an external electric...
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Induced Electric Dipoles01:28

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A permanent electric dipole orients itself along an external electric field. This rotation can be quantified by defining the potential energy because the external torque does work in rotating it. Then, the potential energy is minimum at the parallel configuration and maximum at the antiparallel configuration. While the former is a stable equilibrium, the latter is an unstable equilibrium.
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Updated: Oct 15, 2025

A Fabrication and Measurement Method for a Flexible Ferroelectric Element Based on Van Der Waals Heteroepitaxy
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Enabling Distributed Intelligence with Ferroelectric Multifunctionalities.

Kui Yao1, Shuting Chen1, Szu Cheng Lai1

  • 1Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 2 Fusionopolis Way, Innovis, 138634, Singapore.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|November 1, 2021
PubMed
Summary
This summary is machine-generated.

Ferroelectric materials enable energy-autonomous smart sensors and systems by harvesting energy and storing data. Their unique properties support sustainable computing and advanced cyber-physical applications.

Keywords:
dielectricferroelectricmemorypiezoelectricpyroelectricself-powersensor

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Area of Science:

  • Materials Science
  • Electrical Engineering
  • Physics

Background:

  • The rise of cyber-physical systems and the Internet of Things necessitates intelligent, distributed sensors and edge computing.
  • Energy autonomy is a critical challenge for widespread deployment of these smart systems.

Purpose of the Study:

  • To review advancements in ferroelectric materials and devices for energy-autonomous sensors and smart systems.
  • To highlight the unique properties of ferroelectrics and their synergistic combinations for innovative device applications.

Main Methods:

  • Analysis of fundamental ferroelectric characteristics: dielectric permittivity, polarization, piezoelectric, pyroelectric, and bulk photovoltaic effects.
  • Review of ferroelectric device applications as sensors, energy transducers, capacitors, and nonvolatile memories.
  • Emphasis on material-critical innovations leveraging multiple ferroelectric functionalities.

Main Results:

  • Ferroelectrics can act as self-powered sensors, converting stimuli directly into signals.
  • They function as reliable energy harvesters, capturing various energy forms.
  • Ferroelectric nonvolatile memories enable ultralow-power digital processors, sustainable systems, and neuromorphic computing.

Conclusions:

  • Ferroelectric materials offer a pathway to energy autonomy in distributed intelligent systems.
  • The synergistic combination of ferroelectric properties is key to developing advanced, self-powered sensors and smart devices.
  • These materials are crucial for next-generation cyber-physical applications requiring sustainable and efficient operation.