Lecture image placeholder

Premium content

Access to this content requires a subscription. You must be a premium user to view this content.

Monthly subscription - $9.99Pay per view - $4.99Access through your institutionLogin with Underline account
Need help?
Contact us
Lecture placeholder background


MMM 2022

November 07, 2022

Minneapolis, United States

Spin orbit torque driven in

Chirality is one of important research topics in the diverse field because it leads interesting phenomena.1 Since the chirality by the inversion symmetry breaking has been observed in magnetic ordered system,2 researches on asymmetric exchange coupling was actively investigated.3 Here, the chirality is known as affecting to the dynamic and static phenomena, so it can be one approach that influence on the magnetization state as well. But for understanding the role of chirality deeply, it is necessary to control the chirality as a unique variable while keeping other materials parameters. However, controlling only the chirality is limited because it is determined from the materials and structural origins in general, affecting other parameters simultaneously. Therefore, more consideration is still required for revealing the role of chirality deeply. For understanding the chirality precisely, we prepared the lateral perpendicular magnetic anisotropy (PMA) symmetry breaking system. In this system, magnetizations of each PMA react differently by the SOT, which results in in-homogeneous spin configuration (i-hSC). Here, notable point is that i-hSC can induce different system energy when it is combined with interfacial Dzyaloshinskii-Moriya interaction (DMI) as seen in Fig. 1. The effect of i-hSC can be confirmed experimentally by measuring magnetization switching because the chirality reversal also occurs simultaneously (clockwise (CW) ↔ counter-clockwise (CCW)). Here, because more (less) energy should be required for switching the stabilized (destabilized) i-hSC, opposite directional shift of hysteresis loop is shown as seen in Fig. 2. The resultant degree of shift is directly related with the system energy variation, and our experimental analysis suggests the possibility of the chirality as one method determining the magnetization state.

F. Evers, A. Aharony, N. Bar-Gill, Advanced Materials, Vol.34, p.2106629 (2022) M. Bode, M. Heide, K. von Bergmann, Nature, Vol.447, p.190-193 (2007) S.-H. Yang, R. Naaman, Y. Paltiel, Nature Reviews Physics, Vol.3, p.328-343 (2021)

Next from MMM 2022

Logic devices based on gate controlled skyrmion trajectory

Logic devices based on gate controlled skyrmion trajectory

MMM 2022

+1Mahathi KuchibhotlaArabinda HaldarBibekananda Paikaray
Bibekananda Paikaray and 3 other authors

07 November 2022

Stay up to date with the latest Underline news!

Select topic of interest (you can select more than one)


  • All Lectures
  • For Librarians
  • Resource Center
  • Free Trial
Underline Science, Inc.
1216 Broadway, 2nd Floor, New York, NY 10001, USA

© 2023 Underline - All rights reserved