Study of Magnetic Excitation in Singlet-Ground-State Magnets CsFeCl${}_3$ and RbFeCl${}_3$ by Nuclear Magnetic Relaxation

Mitsuru Toda, Takao Goto, Meiro Chiba +1

The temperature dependences of spin-lattice relaxation time $T_1$ of ${}^{133}$Cs in CsFeCl${}_3$ and ${}^{87}$Rb in RbFeCl${}_3$ were measured in the temperature range between 1.5 K and 2…