Talk Prof. Dr. Dazhi Hou at Mainz University

#magnetic #films #spin #applications #optical
Share

Prof. Dr. Dazhi Hou from University of Science and Technology, Hefei, China, will give a talk about 'Electro-Thermal and Magneto-Optical Characterization of Unconventional Antiferromagnets' at Johannes Gutenberg University Mainz. The talk will be in the Curie Room (03-431) at the Institute of Physics (Staudinger Weg 7 in Mainz) on Monday (January 26th) at 11:00 am. 


  Date and Time

  Location

  Hosts

  Registration


  • Add_To_Calendar_icon Add Event to Calendar
  • Institute of Physics, Johannes Gutenberg University Mainz
  • Staudinger Weg 7
  • Mainz, Rheinland-Pfalz
  • Germany 55128
  • Room Number: Curie Room (03-431)
  • Contact Event Host

  Speakers

Dazhi Hou

Topic:

Electro-Thermal and Magneto-Optical Characterization of Unconventional Antiferromagnets

Unconventional antiferromagnets, including non-collinear octupolar systems and recently identified altermagnets, exhibit rich Berry-curvature-driven transport and optical phenomena despite having no net magnetization. A key challenge is how to experimentally access their hidden order parameters via macroscopic measurement. In this talk, the speaker will first discuss lock-in thermography imaging of magnetic octupole domains in non-collinear antiferromagnets via the anomalous Ettingshausen effect, enabling real-space visualization of domain configurations and reversal processes[1]. Then, the speaker will show how thermal contrast arising from the spin-dependent Peltier effect allows deterministic imaging of 0° and 180° Néel domains in altermagnets such as RuO₂[2]. Finally, the speaker will present magneto-optical Kerr measurements in hematite, demonstrating a Néel-order-dominated Kerr effect of altermagnetic origin[3]. Together, these results establish electro-thermal and optical responses as powerful probes of unconventional antiferromagnetic order.

[1] Peng Wang, Wei Xia, Yanfeng Guo*, Dazhi Hou* et al., National Science Review 11(6), nwad308 (2024)
[2] Jiankun Dai, Hua Bai*, Dazhi Hou*, Cheng Song* et al. under review
[3] Haolin Pan, Rui-Chun Xiao, Jiahao Han, Hongxing Zhu, Junxue Li, Qian Niu, Yang Gao, Dazhi Hou, arXiv:2512.07149 (PRL in press)

Address:University of Science and Technology, , Hefei, China