Berlin 2024 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 11: Functional Antiferromagnetism
MA 11.1: Vortrag
Montag, 18. März 2024, 15:00–15:15, EB 202
Anisotropic magneto-transport properties in a short period helical magnet — •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 SPring8, Japan — 7Dep. of Advanced Materials Science, University of Tokyo, Japan — 8Tokyo College, University of Tokyo, Japan
Antiferromagnetic materials have recently attracted considerable attention due to their potential in future spintronic applications thanks to numerous characteristic features: they are robust against external magnetic field, produce no stray field, and display ultrafast dynamics. Anisotropic magnetoresistance (AMR) effect is one way to electrically read out spin textures of antiferromagnets. However, AMR has been so far studied mainly on collinear magnets and its amplitude tends to be small. In this presentation, we will show that partial Fermi surface gapping through Ruderman-Kittel-Kasuya-Yosida (RKKY) interactions can enlarge AMR in a short period helical magnet and show some experimental results of a rare-earth-based target material.
Keywords: helical magnetism; anisotropic magnetoresistance; spintronics; rare earth magnetism; RKKY interaction