Related Experiment Video
Updated: Apr 11, 2026
06:53
Scanning SQUID Study of Vortex Manipulation by Local Contact
Published on: February 1, 2017
7.4K
Guided current-induced skyrmion motion in 1D potential well
I Purnama1, W L Gan1, D W Wong1
1School of Physical &Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371.
Scientific Reports
|May 30, 2015
Summary
Magnetic skyrmions, used in memory devices, can be guided and protected from annihilation using local potential barriers. This method also increases skyrmion speed by enhancing spin transfer torque.
Area of Science:
- Condensed matter physics
- Materials science
- Nanotechnology
Background:
- Magnetic skyrmions are topologically protected, particle-like spin textures with potential for data storage.
- Their movement is crucial for spintronic devices, but is hindered by the Magnus force, causing deflection and annihilation.
- Overcoming skyrmion deflection is essential for practical device applications.
Purpose of the Study:
- To investigate a method for controlling magnetic skyrmion motion.
- To prevent skyrmion annihilation at device edges.
- To enhance skyrmion velocity for improved device performance.
Main Methods:
- Simulating magnetic skyrmion dynamics under current-driven conditions.
- Implementing strong local potential barriers to confine and guide skyrmions.
- Analyzing the effects of confinement on spin transfer torque and Magnus force interactions.
Main Results:
- Demonstrated successful guidance of magnetic skyrmions using engineered potential barriers.
- Prevented skyrmion annihilation at simulated film edges.
- Observed a significant increase in skyrmion speed due to enhanced spin transfer torque in confined geometries.
Conclusions:
- Local potential barriers offer an effective strategy to control skyrmion trajectories.
- This approach mitigates skyrmion annihilation, paving the way for robust skyrmion-based technologies.
- The enhanced spin transfer torque in confined skyrmions opens new avenues for high-speed spintronic devices.
Related Concept Videos
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
01:22Motion Of A Charged Particle In A Magnetic Field
8.2K
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...
8.2K
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
01:24Potential Due to a Magnetized Object
892
Magnetic dipoles in magnetic materials are aligned when placed under an external magnetic field. For paramagnets and ferromagnets, dipole alignment occurs in the direction of the magnetic field. However, the dipoles align opposite to the field in the case of diamagnets. This state of magnetic polarization due to the external field is called magnetization. Magnetization is defined as the dipole moment per unit volume. It plays a similar role to polarization in electrostatics.
The vector...
The vector...
892
01:29Potential Due to a Polarized Object
932
A neutral atom consists of a positively charged nucleus surrounded by a negatively charged electron cloud. When placed in an external electric field, the external electric force pulls the electrons and nucleus apart, opposite to the intrinsic attraction between the nucleus and the electrons. The opposing forces balance each other with a slight shift between the center of masses of the nucleus and the electron cloud, resulting in a polarized atom. On the other hand, a few molecules, like water,...
932
01:23Electric Field of a Charged Disk
3.6K
The simplest case of a surface charge distribution is the uniformly charged disk. Calculating its electric field also helps us calculate the electric field of a large plane of charge.
The system's symmetry is in the cylindrical directions across the plane of the charge. As a result, the electric fields created by various surface charge elements nullify each other in the direction parallel to the surface. Thereby, the resulting electric field is perpendicular to the plane. Since the disk is...
The system's symmetry is in the cylindrical directions across the plane of the charge. As a result, the electric fields created by various surface charge elements nullify each other in the direction parallel to the surface. Thereby, the resulting electric field is perpendicular to the plane. Since the disk is...
3.6K