Related Experiment Video
Updated: Jul 1, 2025

Sputter Growth and Characterization of Metamagnetic B2-ordered FeRh Epilayers
Published on: October 5, 2013
Room temperature chirality switching and detection in a helimagnetic MnAu2 thin film
Hidetoshi Masuda1, Takeshi Seki2, Jun-Ichiro Ohe3
1Institute for Materials Research, Tohoku University, Sendai, Japan. hidetoshi.masuda.c8@tohoku.ac.jp.
Abstract:
Helimagnetic structures, in which the magnetic moments are spirally ordered, host an internal degree of freedom called chirality corresponding to the handedness of the helix. The chirality seems quite robust against disturbances and is therefore promising for next-generation magnetic memory. While the chirality control was recently achieved by the magnetic field sweep with the application of an electric current at low temperature in a conducting helimagnet, problems such as low working temperature and cumbersome control and detection methods have to be solved in practical applications. Here we show chirality switching by electric current pulses at room temperature in a thin-film MnAu2 helimagnetic conductor. Moreover, we have succeeded in detecting the chirality at zero magnetic fields by means of simple transverse resistance measurement utilizing the spin Berry phase in a bilayer device composed of MnAu2 and a spin Hall material Pt. These results may pave the way to helimagnet-based spintronics.
Related Concept Videos
¹H NMR of Conformationally Flexible Molecules: Variable-Temperature NMR
Atomic Nuclei: Nuclear Spin State Population Distribution
¹H NMR of Conformationally Flexible Molecules: Temporal Resolution
Ferromagnetism
¹H NMR Chemical Shift Equivalence: Enantiotopic and Diastereotopic Protons
In chiral compounds such as 2-butanol, replacing the methylene hydrogens at C3 produces a pair of...
Atomic Nuclei: Nuclear Spin State Overview

