関連する実験動画
Updated: Apr 10, 2026
06:53
Scanning SQUID Study of Vortex Manipulation by Local Contact
Published on: February 1, 2017
7.4K
マグネティズム マグネティズム. 磁気スキルミオンバブルを吹き飛ばす
Wanjun Jiang1, Pramey Upadhyaya2, Wei Zhang1
1Materials Science Division, Argonne National Laboratory, Lemont, IL 60439, USA.
Science (New York, N.Y.)
|June 13, 2015
まとめ
科学者は,固体系における電流を用いて,石の泡に似た磁気スキーミオンバブルを生成した. スピントロニクスにおけるこの突破は,磁気構造を制御する新しい方法を提供します.
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) とは
背景:
- トポロジカル・トランジションは,薄膜から石の泡が形成される過程で観察される.
- 磁気スキーミオンは,トポロジカルな性質を持つ粒子状の磁気構造である.
- 磁性スキルミオンを制御することは,高度なスピントロニックデバイスの開発に不可欠です.
研究 の 目的:
- 固体系における磁気スキーミオンバブルの生成を実証する.
- スキルミオンバブル形成におけるスピン軌道トルクの役割を調査するために.
- これらのダイナミックに作成されたスキルミオンの操作とダイナミクスを探求するために.
主な方法:
- 逆対称性が破られたシステムで不均一な平面内電流を利用した.
- 実験的に,幾何学的収縮から磁性スキルミオンバブルを生成した.
- 磁場構造の不安定性を分析し,レイリー・プラトーの不安定に類似した.
主要な成果:
- 電流駆動的な方法を使用して磁性スキルミオンバブルを成功裏に生成しました.
- スキルミオンの形成を制御する相図を特定した.
- ダイナミックに作成されたスキルミオンの効率的な操作を実証し,デピングとモーションを含む.
結論:
- ストライプドメインから磁気スキルミオンバブルへの電流による変換は実現可能である.
- この方法は,磁気スキルミオンの作成と制御のための新しいアプローチを提供します.
- この発見は,スキルミオンベースのスピントロニクス分野を大幅に前進させる可能性がある.
さらに関連する動画
06:27Fabrication of Magnetic Nanostructures on Silicon Nitride Membranes for Magnetic Vortex Studies Using Transmission Microscopy Techniques
Published on: July 2, 2018
8.6K
08:19Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System
Published on: May 9, 2021
2.9K
関連する概念動画
01:27Magnetic Fields
8.0K
A moving charge or a current creates a magnetic field in the surrounding space, in addition to its electric field. The magnetic field exerts a force on any other moving charge or current that is present in the field. Like an electric field, the magnetic field is also a vector field. At any position, the direction of the magnetic field is defined as the direction in which the north pole of a compass needle points.
A magnetic field is defined by the force that a charged particle experiences...
A magnetic field is defined by the force that a charged particle experiences...
8.0K
01:19Magnetic Field Lines
6.5K
The representation of magnetic fields by magnetic field lines is very useful in visualizing the strength and direction of the magnetic field. Each of the magnetic field lines forms a closed loop. The field lines emerge from the north pole (N), loop around to the south pole (S), and continue through the bar magnet back to the north pole.
Magnetic field lines follow several hard-and-fast rules:
Magnetic field lines follow several hard-and-fast rules:
6.5K
01:23Magnetic Field due to Moving Charges
12.5K
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...
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...
12.5K
01:18Magnetic Flux
5.4K
The magnetic flux measures the number of magnetic field lines passing through a given surface area. The SI unit for magnetic flux is the weber (Wb). Magnetic flux is a scalar quantity. It depends on three factors: the strength of the magnetic field B, the area through which the field lines pass, and the relative orientation of the field with the surface area.
Suppose a surface is divided into elements of area dA. For each element, the component of the magnetic field that is normal to the...
Suppose a surface is divided into elements of area dA. For each element, the component of the magnetic field that is normal to the...
5.4K
00:59Atomic Nuclei: Nuclear Magnetic Moment
3.6K
All atomic nuclei are positively charged. When they have a nonzero spin, they behave like rotating charges. As a consequence of their charge and spin, these nuclei generate a magnetic field (B). This, in turn, gives rise to a magnetic moment (μ), which is randomly oriented in the absence of an external magnetic field. When an external magnetic field (B0) is applied, the magnetic moment vectors can align with the field or against it in 2 + 1 orientations. A hydrogen nucleus, which is just a...
3.6K
01:15Magnetic Vector Potential
1.8K
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...
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...
1.8K