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Related Experiment Video

Updated: Feb 28, 2026

Scanning SQUID Study of Vortex Manipulation by Local Contact

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Published on: February 1, 2017

Deterministic Néel Vector Switching of Altermagnets Via Magnetic Octupole Torque.

Seungyun Han^1,2, Insu Baek^1,2, Kyoung-Whan Kim^2,3

¹Department of Physics, Pohang University of Science and Technology, Pohang, Republic of Korea.

Small (Weinheim an Der Bergstrasse, Germany)

|February 27, 2026

Summary

Researchers have discovered a new method to control altermagnets using magnetic multipole currents. This technique enables deterministic switching and single-domain configuration, crucial for spintronic devices.

Keywords:

altermagnetism magnetic octupole multipole dynamics switching

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Area of Science:

Condensed matter physics
Materials science
Spintronics

Background:

Altermagnets are emerging materials for advanced spintronic devices.
Achieving a single-domain configuration in altermagnets is critical for device applications but remains a significant challenge.

Purpose of the Study:

To theoretically investigate the injection of magnetic multipoles into altermagnets.
To demonstrate a method for deterministic switching and single-domain formation in altermagnets.

Main Methods:

Theoretical consideration of magnetic multipole injection via in-plane current in altermagnet/normal metal bilayers.
Analysis of torque generated by magnetic octupole injection in d-wave altermagnets.

Main Results:

Magnetic octupole injection generates torque capable of deterministic, magnetic-field-free switching of the Néel vector.
This method transforms multidomain altermagnets into a single-domain state.
The technique is applicable to diverse altermagnets.

Conclusions:

Magnetic multipole currents offer a promising route for controlling altermagnets.
This approach facilitates the device application and fundamental study of altermagnets.
The study highlights the utility of magnetic multipole currents in materials science.