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関連する概念動画

Magnetic Field due to Moving Charges01:23

Magnetic Field due to Moving Charges

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A stationary charge creates and interacts with the electric field, while a moving charge creates a magnetic field.
Consider a point charge moving with a constant velocity. Like the electric field, the magnetic field at any point is directly proportional to the magnitude of the charge and inversely proportional to the square of the distance between the source point and the field point. However, unlike the electric field, the magnetic field is always perpendicular to the plane containing the line...
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Magnetic Field Due To A Thin Straight Wire01:28

Magnetic Field Due To A Thin Straight Wire

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Consider an infinitely long straight wire carrying a current I. The magnetic field at point P at a distance a from the origin can be calculated using the Biot-Savart law.
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Diamagnetism01:26

Diamagnetism

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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....
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Colors and Magnetism03:02

Colors and Magnetism

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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...
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Motion Of A Charged Particle In A Magnetic Field01:22

Motion Of A Charged Particle In A Magnetic Field

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A charged particle experiences a force when moving through a magnetic field. Consider the field to be uniform and the charged particle to move perpendicular to it. If the field is in a vacuum, the magnetic field is the dominant factor determining the motion. Since the magnetic force is perpendicular to the direction of motion, a charged particle follows a curved path. The particle continues to follow this curved path until it forms a complete circle. Another way to look at this is that the...
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Atomic Nuclei: Nuclear Relaxation Processes01:23

Atomic Nuclei: Nuclear Relaxation Processes

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In the absence of an external magnetic field, nuclear spin states are degenerate and randomly oriented. When a magnetic field is applied, the spins begin to precess and orient themselves along (lower energy) or against (higher energy) the direction of the field. At equilibrium, a slight excess population of spins exists in the lower energy state. Because the direction of the magnetic field is fixed as the z-axis,  the precessing magnetic moments are randomly oriented around the z-axis.
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Updated: Jun 21, 2025

Radio Frequency Magnetron Sputtering of GdBa2Cu3O7âˆ'ÃŽ ´/ La0.67Sr0.33MnO3 Quasi-bilayer Films on SrTiO3 STO Single-crystal Substrates
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Radio Frequency Magnetron Sputtering of GdBa2Cu3O7âˆ'ÃŽ ´/ La0.67Sr0.33MnO3 Quasi-bilayer Films on SrTiO3 STO Single-crystal Substrates

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光学的に駆動されたYBa2Cu3O6.48における磁場放出

S Fava1, G De Vecchi1, G Jotzu2

  • 1Max Planck Institute for the Structure and Dynamics of Matter, Hamburg, Germany.

Nature
|July 10, 2024
PubMed
まとめ
この要約は機械生成です。

研究者は,光学的に駆動されたクプラートで一時的な二磁性性を観察し,偽ギャップ段階での超伝導相関が強化されたことを示唆した. この発見は,超伝導性の状態と,単にキャリアの移動性の増加を区別するのに役立ちます.

さらに関連する動画

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

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Bulk and Thin Film Synthesis of Compositionally Variant Entropy-stabilized Oxides
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関連する実験動画

Last Updated: Jun 21, 2025

Radio Frequency Magnetron Sputtering of GdBa2Cu3O7âˆ'ÃŽ ´/ La0.67Sr0.33MnO3 Quasi-bilayer Films on SrTiO3 STO Single-crystal Substrates
06:49

Radio Frequency Magnetron Sputtering of GdBa2Cu3O7âˆ'ÃŽ ´/ La0.67Sr0.33MnO3 Quasi-bilayer Films on SrTiO3 STO Single-crystal Substrates

Published on: April 12, 2019

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

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Bulk and Thin Film Synthesis of Compositionally Variant Entropy-stabilized Oxides
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Bulk and Thin Film Synthesis of Compositionally Variant Entropy-stabilized Oxides

Published on: May 29, 2018

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科学分野:

  • 凝縮物質物理学
  • 量子材料について
  • 非均衡量子現象について

背景:

  • 一貫した光学駆動は 量子固体における非均衡の量子相と一時的な現象を誘導する.
  • カップレート超伝導体は,臨界温度 (Tc) 以上でも光学的に駆動された場合,超伝導体のような光学特性を示す.
  • これらの一時的な状態の顕微鏡的性質と非超伝導状態との区別は,特にマイスナー二磁性については不明である.

研究 の 目的:

  • 光学的に駆動されたコパレットのマイスナー二磁性の存在を調査する.
  • 一貫した光学駆動によって誘発される一時的な超伝導状態の顕微鏡的性質を明らかにする.
  • 真の超伝導状態と,単にキャリアの移動性を強化した状態を区別する.

主な方法:

  • 光学的に駆動されたYBa2Cu3O6.48結晶を取り巻く時間依存磁場を調査した.
  • 近隣の磁気光学物質でファラデー回転測定を用いて磁場変化を検出した.
  • 適用された恒常磁場と,超導体のような光学特性を誘導する同一の運転条件.

主要な成果:

  • 光学的に誘導されたYBa2Cu3O6.48結晶に一時的な二磁性反応が観察された.
  • ダイアマグネティック反応の大きさは,均衡型II型超伝導体と同等であった.
  • 観測された二磁気性 (体積感受性 χv の順序−0.3) は,光誘導による移動性の増加のみと矛盾している.

結論:

  • 暫定的な二磁性反応は,光学的に駆動された状態での超伝導性の証拠を提供します.
  • この発見は,コヒーレント光学ドライビングが,擬似ギャップフェーズ内の初期超伝導相関を強化または同期するという概念を支持する.
  • 結果は,単にキャリアの移動性が強化された非超伝導状態から観測された現象を区別するのに役立ちます.