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関連する概念動画

Magnetic Field of a Solenoid01:18

Magnetic Field of a Solenoid

A solenoid is a conducting wire coated with an insulating material, wound tightly in the form of a helical coil. The magnetic field due to a solenoid is the vector sum of the magnetic fields due to its individual turns. Therefore, for an ideal solenoid, the magnetic field within the solenoid is directly proportional to the number of turns per unit length and the current. Conversely, the magnetic field outside the solenoid is zero.
Consider a solenoid with 100 turns wrapped around a cylinder of...
Torque On A Current Loop In A Magnetic Field01:13

Torque On A Current Loop In A Magnetic Field

The most common application of magnetic force on current-carrying wires is in electric motors. These consist of loops of wire, which are placed between the magnets with a magnetic field. When current flows through the loops, the magnetic field applies torque, which causes the shaft to rotate, thus converting electrical energy to mechanical energy.
Consider a rectangular current-carrying loop containing N turns of wire, placed in a uniform magnetic field. The net force on a current-carrying loop...
Faraday Disk Dynamo01:23

Faraday Disk Dynamo

A Faraday disk dynamo is a DC generator, producing an emf that is constant in time. It consists of a conducting disk that rotates with a constant angular velocity in the magnetic field, perpendicular to the disk's plane. The rotation of the disk causes a change in magnetic flux, which induces an emf, causing opposite charges to develop on the rim and in the center of the disk. The polarity of the induced emf can be determined by the direction of the magnetic field and the direction of the...
Toroids01:27

Toroids

A toroid is a closely wound donut-shaped coil constructed using a single conducting wire. In general, it is assumed that a toriod consists of multiple circular loops perpendicular to its axis.
When connected to a supply, the magnetic field generated in the toroid has field lines circular and concentric to its axis. Conventionally, the direction of this magnetic field is expressed using the right-hand rule. If the fingers of the right hand curl in the current direction, the thumb points in the...
Magnetic Vector Potential01:15

Magnetic Vector Potential

In electrostatics, the electric field can be written as the negative gradient of the potential. In magnetostatics, the zero divergence of the magnetic field ensures that the magnetic field can be expressed as the curl of a vector potential. This potential is known as the magnetic vector potential.
Consider an ideal solenoid with n turns per unit length and radius R. If I is the current through the solenoid, the magnetic field inside the solenoid is expressed as the product of vacuum...
Magnetic Field due to Moving Charges01:23

Magnetic Field due to Moving Charges

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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関連する実験動画

Updated: May 13, 2026

Magnetically Induced Rotating Rayleigh-Taylor Instability
06:42

Magnetically Induced Rotating Rayleigh-Taylor Instability

Published on: March 3, 2017

スピンのトルクによって生成された磁気滴ソリトン

S M Mohseni1, S R Sani, J Persson

  • 1Materials Physics, School of Information and Communication Technology, KTH Royal Institute of Technology, Kista, Sweden.

Science (New York, N.Y.)
|March 16, 2013
PubMed
まとめ

研究者は,スピン転送トルクを使用して,消散性ソリトンの一種である稀な磁気同類である磁気滴ソリトンを観察しました. これらのソリトンは複雑なダイナミクスを示し,スピントロニクスアプリケーションのために電流と磁場によって制御することができます.

さらに関連する動画

Aqueous Droplets Used as Enzymatic Microreactors and Their Electromagnetic Actuation
08:27

Aqueous Droplets Used as Enzymatic Microreactors and Their Electromagnetic Actuation

Published on: August 28, 2017

Scanning SQUID Study of Vortex Manipulation by Local Contact
06:53

Scanning SQUID Study of Vortex Manipulation by Local Contact

Published on: February 1, 2017

関連する実験動画

Last Updated: May 13, 2026

Magnetically Induced Rotating Rayleigh-Taylor Instability
06:42

Magnetically Induced Rotating Rayleigh-Taylor Instability

Published on: March 3, 2017

Aqueous Droplets Used as Enzymatic Microreactors and Their Electromagnetic Actuation
08:27

Aqueous Droplets Used as Enzymatic Microreactors and Their Electromagnetic Actuation

Published on: August 28, 2017

Scanning SQUID Study of Vortex Manipulation by Local Contact
06:53

Scanning SQUID Study of Vortex Manipulation by Local Contact

Published on: February 1, 2017

科学分野:

  • 凝縮物質物理学 凝縮物質物理学
  • スピントロニクス (Spintronics) は,スピントロニクス (Spintronics) を開発したものです.
  • 非線形ダイナミクス 非線形ダイナミクス

背景:

  • 分散型ソリトンは,様々なシステムで観察される非線形現象である.
  • 消散型ソリトンの磁性アナログの実験的観測は困難でした.
  • 垂直磁性アニソトロピー (PMA) 薄膜は,スピントロニックデバイスにとって極めて重要です.

研究 の 目的:

  • 磁気滴ソリトンを実験的に観察し,特徴づけること.
  • これらの磁性ソリトンの動的性質を調査するために.
  • スピントロニクスとマグノニクスの潜在的な応用を探求する.

主な方法:

  • PMA磁気薄膜のナノコンタクトの下のスピン転送トルクを利用した.
  • ソリトンダイナミクスを分析するために,マイクロ磁気シミュレーションを使用しました.
  • 電流と磁場を用いた制御メカニズムを研究した.

主要な成果:

  • 消散性磁気ドロップレットソリトンを成功裏に生成しました.
  • 振動運動,回転,呼吸状態を含む多様なダイナミックな行動が観察されました.
  • ドロップレット・ソリトンの制御性が,電流と磁場を通して実証された.

結論:

  • この研究は,磁気滴ソリトンの最初の実験的観測を報告しています.
  • これらのソリトンは,豊かで制御可能なダイナミクスを示します.
  • 潜在的なアプリケーションには,高度なスピントロニック,マグノニック,およびドメインウォールデバイスが含まれます.