AUTHOR=Chen Zhaohui , Li Miao , Liu Caixing , Ma Zongwei , Han Yuyan , Gao Jianhua , Wei Wensen , Sheng Zhigao , Du Haifeng 

TITLE=Magnetic Domain Structure in Ferromagnetic Kagome Metal DyMn6Sn6

JOURNAL=Frontiers in Physics

VOLUME=Volume 9 - 2021

YEAR=2021

URL=https://www.frontiersin.org/journals/physics/articles/10.3389/fphy.2021.685510

DOI=10.3389/fphy.2021.685510

ISSN=2296-424X

ABSTRACT=Two types of magnetic domains, i.e., type-I domain belt domain and type-II domain new stripe domain are observed in a kagome metal DyMn6Sn6 by microscopic magneto-optic Kerr imaging technique. From 255 K to 235 K, the spin reorientation is observed directly in DyMn6Sn6. We analyze the structure of two types of domains through brightness distribution of the images. The type-II domain exists from 235 K to 160 K by zero field cooling (ZFC). At the same time, type-I domain and type-II domain coexist and transform into each other with the variation of temperature. Type-II domains can easily transform into type-I domains when the temperature and magnetic field changes, and this process is irreversible. These results demonstrate that the type-I domain is more stable than the type-II domain. The phase diagram of magnetic domains in DyMn6Sn6 is obtained.