Investigating Magnetic Phase Transitions in Helimagnets through Resonant Elastic X-ray Scattering

Yu-Hui Liang^1*, Chun-Hao Lai¹, Po-Chun Chang^1,2, Sabreen Hammouda², Daisuke Okuyama³, Shih-Chang Weng⁴, Jun Okamoto⁴, Taku J. Sato⁵, Yixi Su², Chao-Hung Du¹

¹Department of Physics, Tamkang University, New Taipei City, Taiwan
²Jülich Centre for Neutron Science, Jülich, Germany
³Institute of Materials Structure Science (IMSS), High Energy Accelerator Research Organization (KEK), Ibaraki, Japan
⁴National Synchrotron Radiation Research Center, Hsinchu, Taiwan
⁵Institute of Multidisciplinary Research for Advanced Materials, Institute of Multidisciplinary Research for Advanced Materials,, Sendai, Japan

* Presenter:Yu-Hui Liang, email:yhl050893@gms.tku.edu.tw

Investigating the phase transitions of magnetic materials offers valuable insights into their fundamental physical mechanisms, broadening their potential applications' scope. While neutron scattering techniques are commonly employed by researchers for such studies, resonant elastic scattering using synchrotron radiation also proves highly effective in this field. This study presents x-ray scattering results for two helimagnetic materials: the double-layered perovskite YBaCuFeO₅ (YBCFO) and the Kagome metal (Tm, Er)Mn₆Sn₆ (TEMS). For YBCFO, the x-ray scattering data distinctly isolate the contribution of Fe³⁺, providing a more refined depiction of the helical magnetic structure at low temperatures. In the case of TEMS, we detected unique resonant phenomena associated with Er and Mn. Notably, the Mn resonances reveal more intricate results, which could further illuminate the specific mechanisms underlying magnetic phase transitions, thereby addressing the limitations inherent in neutron scattering experiments.

Keywords: Helimagnet, Neutron Sacttering, Resonant Elastic X-ray Scattering