Abrikosov Vortex Displacement via Laser-Induced Thermal Gradient
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Solution Overview
Problem
Current methods for controlling the displacement of a single Abrikosov vortex in superconducting elements are limited by slow displacement rates and small-scale movement, with magnetic force microscopy being impractical due to insufficient force to overcome trapping forces.
Innovation Solution
Generating a temperature gradient using a focused laser beam to attract the vortex towards the hottest zone, creating a force that exceeds the trapping force, allowing for controlled and rapid displacement of individual vortices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If magnetic force microscopy is used to move a single vortex, then the vortex can be displaced, but the displacement is slow and limited to very small scales
Solution Approach 1:
The patent replaces the mechanical contact method of magnetic force microscopy with an optical field (laser) to exert force on the vortex. The laser beam creates a thermal gradient that generates a force on the vortex, eliminating the need for physical contact and enabling faster, long-range manipulation without operational limitations.
Solution Approach 2:
The patent changes the physical parameter used to move the vortex from mechanical force to thermal gradient-induced force. By controlling the laser power and positioning, the thermal gradient parameter can be adjusted to achieve desired vortex displacement speeds and ranges, overcoming the speed and scale limitations of mechanical methods.
2Force
If magnetic force microscopy applies force to the vortex, then the vortex may move, but the applied force is often less than the vortex trapping force making movement impossible
Solution Approach 1:
The patent changes the force generation mechanism from direct mechanical force to thermal gradient-induced force. The laser-induced thermal gradient can generate forces that exceed the vortex trapping force, as demonstrated by successful vortex displacement. The force magnitude can be controlled by adjusting laser power, ensuring reliable vortex movement.
Solution Approach 2:
The patent introduces temperature gradient as an intermediary between the laser and the vortex. The laser heats the superconducting material, creating a thermal gradient that mediates the force transmission to the vortex. This indirect force transmission mechanism overcomes the limitation of insufficient direct mechanical force.
3Manufacturing precision
If a laser beam is focused to create a heating zone, then the vortex is attracted to the hottest area, but precise positioning requires controlled heating
Solution Approach 1:
The patent applies local heating through a focused laser beam to create a localized temperature gradient. The heating zone is confined to a small region where the vortex needs to be positioned, allowing precise vortex manipulation without affecting the entire superconducting material. The local quality of heating enables accurate vortex placement.
Solution Approach 2:
The patent employs feedback control by monitoring vortex position (e.g., using imaging techniques) and adjusting laser beam positioning and power accordingly. This closed-loop control system achieves precise vortex positioning despite the complexity of thermal field control, as the system adapts to actual vortex location and movement.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables precise and efficient displacement of Abrikosov vortices, overcoming the limitations of existing methods by achieving faster and more controlled movement, with the potential for high-frequency vortex manipulation suitable for information storage applications.
Implementation Method 1
In particular, a thermal diffusion force due to the Nernst effect is identified. This force is proportional to the temperature gradient but directed from high to low temperatures.
Implementation Method 2
Thanks to the present invention, because the heating is inhomogeneous, a temperature gradient is generated and the vortex is attracted towards the hottest area
Implementation Method 3
during the inhomogeneous heating step of the superconducting element, the heating zone is heated by applying a laser beam
Implementation Method 4
the heating is inhomogeneous, a temperature gradient is generated
Data Source
Figure 1~2
Figure 3~4c
Figure 5~6b
AI summary
The invention relates to a method for controlling the movement of an Abrikosov vortex of an element consisting of a supraconductive material, a so-called supraconductive element, comprising a step of inhomogeneously heating the supraconductive element with the Abrikosov vortex in a heating zone in such a way as to move the Abrikosov vortex towards the heating zone.