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Polar and Cylindrical Coordinates

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Related Experiment Video

Updated: Feb 10, 2026

Iron Nanowire Fabrication by Nano-Porous Anodized Aluminum and its Characterization

Iron Nanowire Fabrication by Nano-Porous Anodized Aluminum and its Characterization

Published on: October 6, 2019

Magnetization Ratchet in Cylindrical Nanowires.

Cristina Bran¹, Eider Berganza¹, Jose A Fernandez-Roldan¹

¹Institute of Materials Science of Madrid, CSIC , 28049 Madrid , Spain.

|May 30, 2018

Summary

Researchers developed a simple magnetic ratchet using FeCo/Cu nanowires. This effect enables sequential magnetization reversal, paving the way for advanced 3D spintronic devices.

Keywords:

dipolar coupling magnetic domains multisegmented nanowires remagnetization ratchet vortex domain walls

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Last Updated: Feb 10, 2026

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Area of Science:

Spintronics
Materials Science
Nanotechnology

Background:

Unidirectional motion of domain walls is crucial for spintronic shift registers.
Achieving the magnetic ratchet effect typically requires complex nanomagnetic structures.

Purpose of the Study:

To report a simple remagnetization ratchet effect.
To demonstrate its origin in asymmetric potentials of engineered nanowires.

Main Methods:

Fabrication of FeCo/Cu cylindrical nanowires with increasing ferromagnetic segment lengths.
Investigation of magnetization reversal propagation through magnetostatic coupling.

Main Results:

A natural ratchet effect was observed, driven by asymmetric potentials.
Magnetization reversal propagates sequentially in steps along the nanowire.
The effect is independent of the applied magnetic field direction.

Conclusions:

The designed nanowire structure provides an efficient and natural magnetic ratchet.
This offers a simpler alternative for creating advanced 3D storage and logic devices.