[10p-A33-1~14] 3.7 Optical measurement, instrumentation, and sensor

4:00 PM - 4:15 PM JST(7:00 AM - 7:15 AM UTC)

[10p-A33-8] Observation of magnetic-field-induced detwinning in EuFe₂As₂ single crystals
using a polarizing microscope

〇Shigetoshi Tomita¹, Ko Sasaki^2,3, Souta Takami¹, Ryunosuke Takahashi¹, Shugo Ikeda¹, Kenta Kuroda^2,3, Hiroki Wadati^1,4 (1.Univ. of Hyogo, 2.Hiroshima Univ., 3.WPI-SKCM2, 4.Osaka Univ.)

Keywords:

polarizing microscope,Iron-based superconductors

We directly observed real-space changes in twin domains of EuFe₂As₂ single crystals under an in-plane magnetic field using a polarizing microscope. At 1.7 K, a pronounced domain rearrangement appeared around 0.4 T, and hysteresis was confirmed because the initial state was not recovered after reducing the field. In contrast, no clear change was observed at 30 K, indicating the importance of magnetic-field-induced detwinning at low temperatures.