Ferroic quadrupolar ordering in CeCoSi revealed using ${}^{59}$Co-NMR measurements

Masahiro Manago, Ayano Ishigaki, Hideki Tou +3

A nonmagnetic phase transition at $T_0\sim 12$ K in the tetragonal system CeCoSi with a Kramers doublet ground state is reminiscent of an electric quadrupole ordering, even though…