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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
Trends in Lattice Energy: Ion Size and Charge02:54

Trends in Lattice Energy: Ion Size and Charge

23.7K
An ionic compound is stable because of the electrostatic attraction between its positive and negative ions. The lattice energy of a compound is a measure of the strength of this attraction. The lattice energy (ΔHlattice) of an ionic compound is defined as the energy required to separate one mole of the solid into its component gaseous ions. For the ionic solid sodium chloride, the lattice energy is the enthalpy change of the process:
23.7K

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関連する実験動画

Updated: Jun 8, 2025

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
09:06

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope

Published on: March 24, 2019

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電気駆動による長距離固体無形化 In2Se3

Gaurav Modi1, Shubham K Parate2, Choah Kwon3

  • 1Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA, USA.

Nature
|November 7, 2024
PubMed
まとめ
この要約は機械生成です。

研究者は,直流を利用したインジウムセレニドナノワイヤの固体無形化を達成し,潜在的に低電力電子機器の融解を回避しました. この発見により 電気場とストレスを使って 鉄質物質を制御する 新しい方法が明らかになりました

さらに関連する動画

Advanced Experimental Methods for Low-temperature Magnetotransport Measurement of Novel Materials
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Advanced Experimental Methods for Low-temperature Magnetotransport Measurement of Novel Materials

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Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
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Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses

Published on: June 7, 2018

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関連する実験動画

Last Updated: Jun 8, 2025

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
09:06

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope

Published on: March 24, 2019

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Advanced Experimental Methods for Low-temperature Magnetotransport Measurement of Novel Materials
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Advanced Experimental Methods for Low-temperature Magnetotransport Measurement of Novel Materials

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Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
08:55

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses

Published on: June 7, 2018

8.5K

科学分野:

  • 材料科学
  • 凝縮物質物理学
  • ナノテクノロジー

背景:

  • 電気的に誘導された無形化は,通常,パルス電流と融解プロセスによって達成されます.
  • 固体電気無形化は,高温溶解を避けるため,低電力電子アプリケーションの可能性を秘めています.

研究 の 目的:

  • インジウムセレニドナノワイヤの非従来の長距離固体無形化について報告する.
  • 溶かさずに電動的に誘導された無形化のメカニズムを探求する.

主な方法:

  • 直流 (DC) バイアスを,β"相インジウムセレニドナノワイヤに適用する.
  • 電気場,電流,ピエゾ電気的ストレスとの相互作用の分析.
  • 構造崩壊につながる層間滑り欠陥と偏振回転の観察.

主要な成果:

  • DCバイアスを使ってエネルギー効率の高い長距離固体無形化を実現し,パルス方法とは異なります.
  • 電場,電流,およびレイヤード・フェロー材料におけるストレスを含む多様式結合機構を特定した.
  • 構造的な崩壊と無形化を誘導し, 音響効果によって再現することが示された.

結論:

  • 外部刺激 (電場,電流) と内部ストレスとの結合の新しいメカニズムを明らかにした.
  • この発見は,低電力電子と光学のための新しい材料とデバイスの設計の道を開きます.
  • ナノスケールでの材料構造と相変化の電気制御のための新しい経路を示した.