Jove
Visualize
お問い合わせ
JoVE
x logofacebook logolinkedin logoyoutube logo
JoVEについて
概要リーダーシップブログJoVEヘルプセンター
著者向け
出版プロセス編集委員会範囲と方針査読よくある質問投稿
図書館員向け
推薦の声購読アクセスリソース図書館諮問委員会よくある質問
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experimentsアーカイブ
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教員リソースセンター教員サイト
利用規約
プライバシーポリシー
ポリシー

関連する概念動画

Torque On A Current Loop In A Magnetic Field01:13

Torque On A Current Loop In A Magnetic Field

6.4K
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...
6.4K
Torque01:10

Torque

23.4K
Torque is an important quantity for describing the dynamics of a rotating rigid body. We see the application of torque in many ways in the world, such as when pressing the accelerator in a car, which causes the engine to apply additional torque on the drivetrain. Here, we define torque and provide a framework to create an equation to calculate torque for a rigid body with fixed-axis rotation.
Torque can be considered as the rotational counterpart to force. Since forces change the translational...
23.4K
Spin–Spin Coupling Constant: Overview01:08

Spin–Spin Coupling Constant: Overview

1.6K
In bromoethane, the three methyl protons are coupled to the two methylene protons that are three bonds away. In accordance with the n+1 rule, the signal from the methyl protons is split into three peaks with 1:2:1 relative intensities. The methylene protons appear as a quartet, with the relative intensities of 1:3:3:1.
Qualitatively, any spin plus-half nucleus polarizes the spins of its electrons to the minus-half state. Consequently, the paired electron in the hydrogen–carbon bond must...
1.6K
Magnetic Force On Current-Carrying Wires: Example01:22

Magnetic Force On Current-Carrying Wires: Example

2.4K
In a magnetic field, moving charges encounter a force. If a wire contains these moving charges, i.e., if the wire is carrying a current, then a force acts on the wire as well. Consider a pair of flexible leads holding a wire that is 40 cm long and 10 g in weight in a horizontal position. The wire is placed in a constant magnetic field of 0.40 T, as shown in Figure 1(a). Determine the magnitude and direction of the current flowing in the wire needed to remove the tension in the supporting leads.
2.4K
Magnetic Field due to Moving Charges01:23

Magnetic Field due to Moving Charges

12.3K
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...
12.3K
Ferromagnetism01:31

Ferromagnetism

3.5K
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...
3.5K

こちらも読む

関連記事

共著者、ジャーナル、引用グラフによってこの研究に関連する記事。

並び替え
Same author

Da Vinci 5 in transoral robotic surgery: first impression.

Journal of robotic surgery·2025
Same author

Controlling spin current polarization through non-collinear antiferromagnetism.

Nature communications·2020
Same author

Potent in vitro activity of curcumin and quercetin co-encapsulated in nanovesicles without hyaluronan against Aspergillus and Candida isolates.

Journal de mycologie medicale·2020
Same author

Candida africana vulvovaginitis: Prevalence and geographical distribution.

Journal de mycologie medicale·2020
Same author

MoS<sub>2</sub> pixel arrays for real-time photoluminescence imaging of redox molecules.

Science advances·2019
Same author

Anisotropic spin-orbit torque generation in epitaxial SrIrO<sub>3</sub> by symmetry design.

Proceedings of the National Academy of Sciences of the United States of America·2019

関連する実験動画

Updated: Mar 27, 2026

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

8.7K

トポロジカル・アイソレーターによって生成されたスピン・トランスファー・トルク.

A R Mellnik1, J S Lee2, A Richardella2

  • 1Cornell University, Ithaca, New York 14853, USA.

Nature
|July 25, 2014
PubMed
まとめ

ビスムートセレニドのようなトポロジカル断熱器は,スピン転送トルクを使用して磁気材料を効率的に制御します. この突破は,先進的で低電力磁気メモリと論理デバイスにつながる可能性があります.

さらに関連する動画

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
09:00

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser

Published on: June 28, 2018

10.6K
Magnetic Tweezers for the Measurement of Twist and Torque
11:41

Magnetic Tweezers for the Measurement of Twist and Torque

Published on: May 19, 2014

24.1K

関連する実験動画

Last Updated: Mar 27, 2026

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

8.7K
Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
09:00

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser

Published on: June 28, 2018

10.6K
Magnetic Tweezers for the Measurement of Twist and Torque
11:41

Magnetic Tweezers for the Measurement of Twist and Torque

Published on: May 19, 2014

24.1K

科学分野:

  • 凝縮物質物理学 凝縮物質物理学
  • 材料科学 材料科学とは
  • 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:

  • 磁気デバイスは,非揮発性,高密度,高速,耐久性の高いメモリと論理ソリューションを提供しています.
  • 効率的な電流駆動磁気化操作は,磁気技術の普及に不可欠です.
  • スピン・ホール効果やラシュバ・エデルシュタイン効果によるスピン・軌道相互作用は,電流によるトルクの重要なメカニズムである.

研究 の 目的:

  • トポロジカル・アイソレーター,特にビスムス・セレニド (Bi2Se3) の効率的なスピン・オービタ誘発トルクの可能性を調査する.
  • トポロジカル・イソレータの表面状態から隣接する鉄磁層への電流駆動のスピン・トランスファー・トルクを実験的に実証する.
  • 磁気操作のためのスピン軌道トルク源としてのBi2Se3の効率を評価する.

主な方法:

  • トポロジカル・アイソレーター (Bi2Se3) とフェロマグネット (パーマ合金,Ni81Fe19) を含む薄膜の製造.
  • 電流による磁気効果を検出するために,室温で電気輸送測定を行う.
  • ユニット充電電流密度あたりのトルク強度の分析.

主要な成果:

  • Bi2Se3の電荷電流は,隣接するNi81Fe19フィルムに強いスピン転送トルクを生成しました.
  • 観測されたトルク方向は,トポロジカル・アイソレーターの表面状態からの予測と一致しています.
  • Bi2Se3のトルク効率は,散発伝導のフィルムでも,以前に報告されたスピン転送トルク源を上回りました.

結論:

  • Bi2Se3のようなトポロジカル・アイソレーターは,スピン・トランスファー・トルクの非常に効果的な源です.
  • この研究は,磁気材料の効率的な電気操作のために,トポロジカル断熱器を使用する可能性を実証しています.
  • この発見は,次世代の低電力磁気メモリと,室温で動作する論理デバイスの開発に向けた有望な経路を示唆しています.