Bilayer Kagome Ferrimagnet Exhibiting Exceptional Spontaneous Exchange Bias in TbMn₆(Ge,Ga)₆

H Hankun Xu (Institute of Solid State Chemistry, Department of Physical Chemistry) W Wenjie Li J Junjie Chen S Sergii Khmelevskyi (Austrian Scientific Cluster Research Center, Technical University of Vienna, Operngasse 10, Vienna A-1040, Austria) D Dmitry Khalyavin P Pascal Manuel C Chuanying Xi S Shogo Kawaguchi J Jing Chen W Wanda Yang (Institute of Solid State Chemistry, Department of Physical Chemistry) Q Qinghua Zhang Y Yili Cao (Institute of Solid State Chemistry) C Chengyi Yu (Institute of Solid State Chemistry, Department of Physical Chemistry) Y Yang Ren K Kun Lin (Institute of Solid State Chemistry) X Xianran Xing (Institute of Solid State Chemistry)