MANA International Symposium 2025

Session 6-1

Title

Nonreciprocal thermal and electrical responses in helimagnets

Author's photo

Authors

Yoshinori Onose

Affiliations

Tohoku University

URL

https://onoselab.imr.tohoku.ac.jp/index.html

Abstract

Helimagnets are magnetic materials in which the magnetic moments are ordered spirally. The noncollinear magnetic order induces a number of novel functionalities. In this presentation, we show our recent discoveries of novel functionalities in helimagnets. One is nonreciprocal thermal transport, which is the thermal rectification along the vector product of magnetization and electric polarization in a multiferroic helimagnet (Fig. 1)[1]. The other is the control of magnetic spiral handedness in metallic helimagnets, achieved by utilizing the inverse effect of nonreciprocal electric transport (Fig. 2)[2,3].

Fig. 1. Schematic illustration of nonreciprocal thermal transport
Fig. 2. Schematic illustration of chirality control by a magnetic field and electric current. This figure is taken from Masuda et al.[3]

Reference

  1. Y. Hirokane, Y. Nii, H. Masuda, Y. Onose, Sci. Adv. 6, eabd3703 (2020). DOI: 10.1126/sciadv.abd3703
  2. N. Jiang, Y. Nii, H. Arisawa, E. Saitoh, Y. Onose, Nat. Commun. 11, 1601 (2020). DOI: 10.1038/s41467-020-15380-z
  3. H. Masuda, T. Seki, J. Ohe, Y. Nii, H. Masuda, K. Takanashi, and Y. Onose, Nat. Commun. 15, 1999 (2024).
    DOI: 10.1038/s41467-024-46326-4