NSRRC Activity Report 2023

020 NSRRC ACTIVITY REPORT 2023 films, and detailed information about the magnetic behavior, spin structure, and magnetic interactions in materials. The breakthrough in this research lies in the comprehensive investigation of magnetic proximity effects in AFM composite thin films and their role in triggering PMA in FM thin films. This study demonstrates how individual AFM films in the composite layer can enhance long-range AFM ordering and modulate the spin structure of adjacent AFM layers, ultimately inducing PMA in adjacent FM films. This research provides essential insights for improving control over PMA in AFM layers and offers potential applications in next-generation perpendicular spintronic devices. (Reported by Ping-Hui Lin) Fig. 2 : (a–c) XAS and XMCD curves of 10-ML Fe 50 Mn 50 /Co/Fe/Cu measured at the (a) Co, (b) Fe, and (c) Mn L 3,2 edges at 300 K in remanent states. (d) In-plane and out-of-plane magnetic hysteresis loops of 4-ML Mn/4-ML Fe 50 Mn 50 /Co/Fe/Cu and 10-ML Fe 50 Mn 50 /2-ML Mn/Co/Cu measured at 300 K. The black arrows (M + or M − ) indicate the remanent states of the films under positive (H + ) or negative (H − ) magnetic field. XAS and XMCD curves of (e) 4-ML Mn/4-ML Fe 50 Mn 50 /Co/Fe/Cu and (f) 10-ML Fe 50 Mn 50 /2-ML Mn/Co/Cu measured at the Mn L 3,2 edge at 300 K in remanent states. Schematic illustrations of the possible AFM spin configurations in the films of (g) PMA-established 4-ML Mn/4-ML Fe 50 Mn 50 / Co/Fe/Cu and (h) 10-ML Fe 50 Mn 50 /2-ML Mn/Co/Cu. [Reproduced from Ref. 1] This report features the work of Bo-Yao Wang and his collaborators published in Phys. Rev. B 108 , 184412 (2023). TLS 05B2 PEEM • MOKE, XMCD, XAS • Spintronic, AFM, PMA Reference 1. B.-Y. Wang, T.-H. Li, B.-X. Liao, C.-H. Hsiao, L.-H. Chang, M.-S. Tsai, T.-H. Chuang, Der-Hsin Wei, Phys. Rev. B 108 , 184412 (2023).