Related Experiment Video
Updated: Jan 18, 2026

Magnetic Tweezers for the Measurement of Twist and Torque
Published on: May 19, 2014
Harnessing Magnetic Octupole Hall Effect to Induce Torque in Altermagnets
Seungyun Han1, Daegeun Jo2,3, Insu Baek1
1Pohang University of Science and Technology, Department of Physics, Pohang 37673, Korea.
None:
d-wave altermagnets have magnetic octupoles as their order parameters [S. Bhowal and N. A. Spaldin, Ferroically ordered magnetic octupoles in d-wave altermagnets, Phys. Rev. X 14, 011019 (2024)PRXHAE2160-330810.1103/PhysRevX.14.011019]. We theoretically show that magnetic octupoles injected from outside generate torque on the d-wave altermagnets. The injection can be achieved by the magnetic octupole Hall effect in an adjacent layer. We calculate the magnetic octupole Hall conductivity of the heavy metal α-W and find a sizable value comparable to its spin Hall conductivity. Our work generalizes the spin Hall phenomenology (generation by heavy metals and detection by torque in ferromagnets) to the magnetic octupole Hall phenomenology (generation by heavy metals and detection by torque in altermagnets), which can be utilized to electrically control magnetic configurations of altermagnets.
Related Concept Videos
Torque On A Current Loop In A Magnetic Field
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...
The Hall Effect
Force On A Current Loop In A Magnetic Field
Ferromagnetism
Magnetic Field Due to Two Straight Wires
Magnetic Field Of A Current Loop

