Cryogenic Lorentz TEM study of a Berezinskii–Kosterlitz–Thouless phase transition in the quasi-two-dimensional ferromagnet K2CuF4?. (August 2021) - Togawa, Yoshihiko; Akashi, Tetsuya; Kasai, Hiroto; Paterson, Gary; McVitie, Stephen; Kousaka, Yusuke; Shinada, Hiroyuki; Kishine, Jun-ichiro; Akimitsu, Jun