相关实验视频
Updated: Jul 4, 2025

06:53
Scanning SQUID Study of Vortex Manipulation by Local Contact
Published on: February 1, 2017
6.8K
在有缺陷的赛道中,圆形磁性Skyrmion的动态
Huangkun Zhu1, Gang Xiang1, Youhua Feng1
1College of Physics, Sichuan University, Chengdu 610065, China.
Nanomaterials (Basel, Switzerland)
|February 9, 2024
概括
圆形斯基米安装置的缺陷会影响它们的运动. 了解这些相互作用是提高基于skyrmion的赛道记忆性能的关键.
科学领域:
- 这就是Spintronics.
- 凝聚物质物理学 凝聚物质物理学
- 材料科学 材料科学 材料科学
背景情况:
- 在圆的 skyrmion 设备中已经报告了 Skyrmion Hall 效应的抑制.
- 缺陷是材料固有的,并影响磁性设备的性能.
- 对于技术应用来说,研究故障设备中的 skyrmion 动力学至关重要.
研究的目的:
- 在有缺陷的赛道设备中系统地研究圆形 skyrmions 的电流驱动动力学.
- 分析缺陷性质和材料参数对 skyrmion 运动的影响.
- 为提高基于skyrmion的赛道记忆的性能提供见解.
主要方法:
- 使用微磁模拟来模拟斯基尔米翁的行为.
- 进行了系统能量分析,以了解缺陷-skyrmion相互作用.
- 模拟的轨迹被分析,以确定不同的运动模式.
主要成果:
- 圆形缺陷磁性参数批判性地决定了圆形 skyrmions 上的力类型 (排斥/吸引) 和大小.
- 确定了四种主要的 skyrmion 运动模式,取决于 DMI 常数 (D),异性质常数 (K),电流密度 (J) 和缺陷大小 (d).
- 一个钉钉的 skyrmion 的最小依赖电流密度 (J) 显示了对 D 和 K 的线性依赖.
结论:
- 这项研究揭示了D,K,J和d对 skyrmion运动模式的复杂合成效应.
- 这些发现提供了对有缺陷的赛道设备中的圆形 skyrmion 动力学有价值的见解.
- 结果可以指导基于skyrmion的赛道内存设备的优化.
相关概念视频
Magnetic Field due to Moving Charges
8.7K
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...
8.7K
Torque On A Current Loop In A Magnetic Field
4.0K
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...
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...
4.0K
Magnetic Field Of A Current Loop
4.6K
Consider a circular loop with a radius a, that carries a current I. The magnetic field due to the current at an arbitrary point P along the axis of the loop can be calculated using the Biot-Savart law.
4.6K
Magnetic Field Due To A Thin Straight Wire
4.8K
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.
4.8K
Motion Of A Charged Particle In A Magnetic Field
4.8K
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...
4.8K
Magnetic Field of a Solenoid
3.9K
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...
Consider a solenoid with 100 turns wrapped around a cylinder of...
3.9K

