Berlin 2024 – scientific programme
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MA: Fachverband Magnetismus
MA 20: Poster I
MA 20.29: Poster
Tuesday, March 19, 2024, 16:30–19:00, Poster A
Helical magnetic order in a polar Weyl semimetal RAlSi — •Ryota Nakano1, Rinsuke Yamada1, Sebastian Esser1, Masaki Gen2, Akiko Kikkawa2, Yasujiro Taguchi2, Maurice Colling3, Jan Masell2,3, Masashi Tokunaga2,4, Hajime Sagayama5, Hiroyuki Ohsumi6, Yoshikazu Tanaka6, Taka-hisa Arima2,7, Yoshinori Tokura1,2,8, and Max Hirschberger1,2 — 1Dep. of Applied Physics, University of Tokyo, Japan — 2RIKEN CEMS, Japan — 3Inst. of Theoretical Solid State Physics, Karlsruhe Institute of Technology, Germany — 4ISSP, University of Tokyo, Japan — 5Inst. of Materials Structure Science, KEK, Japan — 6RIKEN SPring-8, Japan — 7Dep. of Advanced Materials Science, University of Tokyo, Japan — 8Tokyo College, University of Tokyo, Japan
Recently, materials exhibiting both Weyl points and non-collinear or non-coplanar spin textures have been intensely studied. RAlSi/RAlGe (R = rare earth ion) is a promising platform, having Weyl nodes due to their non-centrosymmetric crystal structure, and showing versatile magnetic structures by substituting rare earth ions. Our recent study reveals large anisotropic magnetoresistance in RAlSi. In this presentation, we report various types of helimagnetic order in RAlSi by resonant X-ray scattering measurements, including polarization analysis of the scattered X-rays, at Photon Factory and SPring-8 in Japan.
Keywords: helimagnetism; rare earth magnetism; resonant X-ray scattering; RKKY ineraction