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関連する概念動画

Ferromagnetism01:31

Ferromagnetism

2.9K
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...
2.9K
Paramagnetism01:30

Paramagnetism

3.0K
Paramagnets are materials with unpaired electrons that possess a finite magnetic moment. In the absence of a magnetic field, these moments are randomly oriented, and thus the net moment is zero. Under an external field, a torque acting on the moments tends to align them along the field's direction. However, the random thermal motion of electrons produces a torque opposite to the external field and tries to disorient the moments. These two competing effects align only a few moments along the...
3.0K
Diamagnetism01:26

Diamagnetism

2.9K
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....
2.9K
Colors and Magnetism03:02

Colors and Magnetism

13.9K
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
13.9K
Magnetic Susceptibility and Permeability01:31

Magnetic Susceptibility and Permeability

2.2K
In linear magnetic materials, like paramagnets and diamagnets, magnetization is proportional to the magnetic field intensity. The constant of proportionality, a dimensionless number, is called magnetic susceptibility. The value of the susceptibility depends on the type of material.
When diamagnetic materials are placed under an external magnetic field, the moments opposite to the field are induced. Hence, the susceptibility for diamagnets has a minimal negative value of 10-5–10-6. Since...
2.2K
Types Of Superconductors01:28

Types Of Superconductors

1.6K
A superconductor is a substance that offers zero resistance to the electric current when it drops below a critical temperature. Zero resistance is not the only interesting phenomenon as materials reach their transition temperatures. A second effect is the exclusion of magnetic fields. This is known as the Meissner effect. A light, permanent magnet placed over a superconducting sample will levitate in a stable position above the superconductor. High-speed trains that levitate on strong...
1.6K

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関連する実験動画

Updated: Jan 10, 2026

Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
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Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks

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マルチフェローおよび磁電性材料

W Eerenstein1, N D Mathur, J F Scott

  • 1Department of Materials Science, University of Cambridge, Pembroke Street, Cambridge CB2 3QZ, UK.

Nature
|August 18, 2006
PubMed
まとめ
この要約は機械生成です。

電気的極化と磁気特性が共存する,マルチフェロ材料の魅力的な世界を発見してください. マグネト電気カップリング現象と将来の技術のためのその可能性を探求します.

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Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals
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A Fabrication and Measurement Method for a Flexible Ferroelectric Element Based on Van Der Waals Heteroepitaxy
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A Fabrication and Measurement Method for a Flexible Ferroelectric Element Based on Van Der Waals Heteroepitaxy

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関連する実験動画

Last Updated: Jan 10, 2026

Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
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Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks

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Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals
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A Fabrication and Measurement Method for a Flexible Ferroelectric Element Based on Van Der Waals Heteroepitaxy
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科学分野:

  • 凝縮物質物理学 凝縮物質物理学
  • マテリアルサイエンス 材料科学

背景:

  • 鉄電気結晶は,原子の移動によって切り替え可能な電極化を持っています.
  • 鉄磁性結晶は,量子交換相互作用によって切り替え可能な磁化を示す.
  • 両方の性質を示すマルチフェロ材料は稀ですが,磁電結合はより一般的です.

研究 の 目的:

  • 材料における磁電結合の現象を調査する.
  • 鉄電性と鉄磁性の根本的なメカニズムを理解する.
  • これらの材料の技術的な応用の可能性を調査する.

主な方法:

  • 鉄電性と鉄磁性の基本原理のレビュー.
  • マルチフェロ材料と磁電結合に関する既存の文献の分析.
  • 歴史的研究と最近の進歩についての議論.

主要な成果:

  • 磁気と電気の性質の相互作用である磁電結合は,広範囲にわたる現象です.
  • 真のマルチフェロ材料は稀だが,磁電結合の原理は広く適用できる.
  • 20世紀半ばからの先駆的な研究は,現在の調査のための基礎を築きました.

結論:

  • マグネト電気コップリングの研究は,新しい電子機器の開発に不可欠です.
  • 研究の最近の復活は,先進技術アプリケーションの約束によって推進されています.
  • これらの材料の継続的な探査は,将来の革新のための重要な可能性を秘めています.