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関連する概念動画

Ferromagnetism01:31

Ferromagnetism

2.4K
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...
2.4K
Magnetostatic Boundary Conditions01:28

Magnetostatic Boundary Conditions

1.0K
An electric field suffers a discontinuity at a surface charge. Similarly, a magnetic field is discontinuous at a surface current. The perpendicular component of a magnetic field is continuous across the interface of two magnetic mediums. In contrast, its parallel component, perpendicular to the current, is discontinuous by the amount equal to the product of the vacuum permeability and the surface current. Like the scalar potential in electrostatics, the vector potential is also continuous...
1.0K
The Hall Effect01:30

The Hall Effect

2.6K
Edwin H. Hall, in the year 1879, devised an experiment that could be used to identify the polarity of the predominant charge carriers in a conducting material. From a historical perspective, this experiment was the first to demonstrate that the charge carriers in most metals are negative.
2.6K
Diamagnetism01:26

Diamagnetism

2.5K
Materials consisting of paired electrons have zero net magnetic moments. However, when these materials are placed under an external magnetic field, the moments opposite to the field are induced. Such materials are called diamagnets. Diamagnetism is the response of the diamagnets when placed in an external magnetic field.
Diamagnetism was discovered by Anton Brugmans in 1778 when he observed that bismuth gets repelled by magnetic fields, thus theorizing that diamagnets get repelled by magnets....
2.5K
VSEPR Theory and the Effect of Lone Pairs04:01

VSEPR Theory and the Effect of Lone Pairs

42.6K
Effect of Lone Pairs of Electrons on Molecule Geometry
42.6K
Metallic Solids02:37

Metallic Solids

18.5K
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
18.5K

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関連する実験動画

Updated: Aug 4, 2025

Chemical Synthesis of Porous Barium Titanate Thin Film and Thermal Stabilization of Ferroelectric Phase by Porosity-Induced Strain
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Chemical Synthesis of Porous Barium Titanate Thin Film and Thermal Stabilization of Ferroelectric Phase by Porosity-Induced Strain

Published on: March 27, 2018

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シングルエレメントビスムート単層の二次元フェロ電気

Jian Gou1, Hua Bai2,3, Xuanlin Zhang2

  • 1Department of Physics, National University of Singapore, Singapore, Singapore. phygouj@nus.edu.sg.

Nature
|April 5, 2023
PubMed
まとめ

ビスムスの層で 単元素の電鉄物質を発見しました この突破は オーダーされた電荷の移転と 原子の歪みを利用し 複数のイオンなしで 交換可能な電極化を可能にします

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Sputter Growth and Characterization of Metamagnetic B2-ordered FeRh Epilayers
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A Standard and Reliable Method to Fabricate Two-Dimensional Nanoelectronics
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A Standard and Reliable Method to Fabricate Two-Dimensional Nanoelectronics

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関連する実験動画

Last Updated: Aug 4, 2025

Chemical Synthesis of Porous Barium Titanate Thin Film and Thermal Stabilization of Ferroelectric Phase by Porosity-Induced Strain
08:00

Chemical Synthesis of Porous Barium Titanate Thin Film and Thermal Stabilization of Ferroelectric Phase by Porosity-Induced Strain

Published on: March 27, 2018

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Sputter Growth and Characterization of Metamagnetic B2-ordered FeRh Epilayers
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Sputter Growth and Characterization of Metamagnetic B2-ordered FeRh Epilayers

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A Standard and Reliable Method to Fabricate Two-Dimensional Nanoelectronics
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科学分野:

  • 凝縮物質物理学
  • 材料科学
  • ナノテクノロジー

背景:

  • フェロ電気材料は,反転対称性の破損により,切り替え可能な電極化を示す.
  • 従来型のフェロエレクトリックは,少なくとも2つの構成イオンを極化スイッチングに必要とします.

研究 の 目的:

  • シングルエレメントの電鉄状態の観測を報告する.
  • ビスムート単層におけるフェロ電性のメカニズムを調査する.

主な方法:

  • ビスムスの電子構造と軌道混合の理論的調査.
  • スキャニングプローブ顕微鏡を用いたフェロ電気スイッチングの実験視覚化.

主要な成果:

  • 黒いのようなビスムスの単層は単元素の鉄電性を表している.
  • オーダーされた電荷の移転と 原子の歪みは 逆対称性の破裂した 形構造につながります
  • 平面内電極化と鉄電スイッチングは実験的に確認された.

結論:

  • シングルエレメント・フェロ電気は,フェロ電気機構の理解を広げる.
  • この発見は,将来のフェロ電子機器における新たな応用につながるかもしれない.