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Ferromagnetism01:31

Ferromagnetism

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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...
3.0K
Molecular and Ionic Solids02:54

Molecular and Ionic Solids

19.9K
Crystalline solids are divided into four types: molecular, ionic, metallic, and covalent network based on the type of constituent units and their interparticle interactions.
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
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Ferrocement01:30

Ferrocement

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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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相关实验视频

Updated: Jan 14, 2026

Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals
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根据设计,液体物质放松器是铁电器.

Xinxin Zhang1, Yu Zou1, Minghui Deng1

  • 1South China Advanced Institute for Soft Matter Science and Technology (AISMST), School of Emergent Soft Matter, South China University of Technology, Guangzhou, China.

Nature communications
|October 22, 2025
PubMed
概括

研究人员开发了一种新的流动性和灵活的材料,称为尼马式放松器铁电. 这种新的极性物质状态表现出高场诱导的极化和放松和铁电状态之间的过渡.

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A Fabrication and Measurement Method for a Flexible Ferroelectric Element Based on Van Der Waals Heteroepitaxy
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Bulk and Thin Film Synthesis of Compositionally Variant Entropy-stabilized Oxides
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相关实验视频

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科学领域:

  • 材料科学 材料科学 材料科学
  • 凝聚物质物理学 凝聚物质物理学
  • 铁路电力是铁路的电力.

背景情况:

  • 传统的放松器铁电是结晶的.
  • 探索铁电的液态物质类比是具有挑战性的.
  • 需要一种流动性和灵活性放松器铁电的通用设计.

研究的目的:

  • 揭示一种具有流动性和灵活性质的新型极性物质状态.
  • 为了研究阴性放松或铁电的特性.
  • 了解放松器和铁电状态之间的过渡机制.

主要方法:

  • 在介电介电环境中人工引入带有介电性的极性纳米区域.
  • 对阴性放松剂签名的观察.
  • 分析电场与极化曲线的对比.
  • 使用兰道-金兹堡-德文郡理论重建自由能源景观.

主要成果:

  • 发现一个阴性放松器铁电状态.
  • 观测高场诱导的极化 (1.1μC·cm−2 在5 V·μm−1).
  • 展示两种模式:在高温下稳定放松器和在低温下 induced ferroelectric 过渡.
  • 能源景观从双井形状不断转变为单井形状.

结论:

  • 阴性放松器铁电体代表了一个新的极性物质状态.
  • 这种状态表现出可调节的特性和铁电和放松行为之间的过渡.
  • 这些发现为设计流动性和灵活的铁电材料铺平了道路.