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関連する概念動画

Force On A Current Loop In A Magnetic Field01:17

Force On A Current Loop In A Magnetic Field

Magnetic forces on wires carrying current are most frequently applied in motors. A DC motor is a device that converts electrical energy into mechanical work. In motors, wire loops are enclosed in a magnetic field. When current flows through the loops, the magnetic field applies torque, which causes the shaft to rotate. The direction of the current is reversed once the loop's surface area is lined up with the magnetic field, causing a constant torque on the loop. During the process, commutators...
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...
Electric Generator: Alternator01:25

Electric Generator: Alternator

Electric generators induce an emf by rotating a coil in a magnetic field. A simple alternator is an AC generator that creates electrical energy that varies sinusoidally with time. A simple alternator consists of a conducting loop that is placed inside a uniform magnetic field. The loop is connected to split rings connected to the external circuit with the help of brushes.
The magnetic flux passing through the coil varies sinusoidally as the loop rotates inside the magnetic field. This...
Back EMF01:24

Back EMF

Generators convert mechanical energy into electrical energy, whereas motors convert electrical energy into mechanical energy. A motor works by sending a current through a loop of wire located in a magnetic field. As a result, the magnetic field exerts a torque on the loop. This rotates a shaft, extracting mechanical work from the electrical current sent in initially. When the coil of a motor is turned, magnetic flux changes through the coil, and an emf (consistent with Faraday's law) is induced.
The Swing Equation01:21

The Swing Equation

The Swing Equation is a fundamental tool in power system dynamics, especially for analyzing the behavior of generating units like three-phase synchronous generators. This equation emerges from applying Newton's second law to the rotor of a generator, encompassing factors such as inertia, angular acceleration, and the interplay between mechanical and electrical torques.
In a steady-state operation, the mechanical torque (Τm) supplied to the generator is balanced by the electrical torque (Τe)...
Electro-mechanical Systems01:19

Electro-mechanical Systems

Electromechanical systems are intricate configurations that effectively combine electrical and mechanical elements to achieve a desired outcome. Central to many of these systems is the DC motor, a device that converts electrical energy into mechanical motion, enabling various applications ranging from simple fans to complex robotic mechanisms.
A key component of the DC motor is the armature, a rotating circuit positioned within a magnetic field. As an electric current passes through the...

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関連する実験動画

Updated: Jul 6, 2026

AC Electrokinetic Phenomena Generated by Microelectrode Structures
20:38

AC Electrokinetic Phenomena Generated by Microelectrode Structures

Published on: July 28, 2008

スピン・ガルバニック効果

S D Ganichev1, E L Ivchenko, V V Bel'kov

  • 1Fakultät für Physik, Universität Regensburg, D-93040 Regensburg, Germany. sergey.ganichev@physik.uni-regensburg.de

Nature
|May 10, 2002
PubMed
まとめ
この要約は機械生成です。

研究者らは,半導体ヘテロ構造における新しいスピン-ガルバン効果を実証した. 電子のスピンは,外部電場なしで電流を生成することができ,スピントロニックデバイスのための新しい道を開きます.

さらに関連する動画

Changing the Direction and Orientation of Electric Field During Electric Pulses Application Improves Plasmid Gene Transfer in vitro
04:46

Changing the Direction and Orientation of Electric Field During Electric Pulses Application Improves Plasmid Gene Transfer in vitro

Published on: September 12, 2011

Magnetically Induced Rotating Rayleigh-Taylor Instability
06:42

Magnetically Induced Rotating Rayleigh-Taylor Instability

Published on: March 3, 2017

関連する実験動画

Last Updated: Jul 6, 2026

AC Electrokinetic Phenomena Generated by Microelectrode Structures
20:38

AC Electrokinetic Phenomena Generated by Microelectrode Structures

Published on: July 28, 2008

Changing the Direction and Orientation of Electric Field During Electric Pulses Application Improves Plasmid Gene Transfer in vitro
04:46

Changing the Direction and Orientation of Electric Field During Electric Pulses Application Improves Plasmid Gene Transfer in vitro

Published on: September 12, 2011

Magnetically Induced Rotating Rayleigh-Taylor Instability
06:42

Magnetically Induced Rotating Rayleigh-Taylor Instability

Published on: March 3, 2017

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
  • 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.

背景:

  • 半導体ヘテロ構造における電荷と共に電子のスピンを利用することは,新しいデバイスコンセプトにとって極めて重要です.
  • 従来の電流は,通常,電磁場や濃度/温度グラデーションによって駆動される.

研究 の 目的:

  • 電子のスピンが電流を駆動するスピン-ガルバン効果を実証するために.
  • この効果は,室温下でも,外部電場なしで発生することが示されています.

主な方法:

  • 半導体ヘテロ構造における電子スピンの非均衡,均一な集団を誘導する.
  • スピンアップとスピンダウン電子サブバンドの間のスピンフリップ分散非対称性を利用する.
  • 光学的に指向されたスピン偏振を回転させる磁場を適用することによって,電流の流れを検出する.

主要な成果:

  • 半導体ヘテロ構造におけるスピン・ガルバン効果を成功裏に実証した.
  • 展示された電子のスピンは,外部電場を必要とせずに電流を駆動する.
  • モモントムシフトサブバンドと非対称なスピン・フリップ散乱における顕微鏡起源を特定した.

結論:

  • スピン-ガルバン効果は,電子のスピンを用いて電流を生成するための補完的なメカニズムを提供します.
  • この発見は,電場のないスピントロニックデバイスの開発に重大な影響を及ぼします.
  • この研究は,室温で電流を生成するためにスピン極化を利用する可能性を強調しています.