Single-crystal magnetic susceptibilities of TbRh2Si2. Determination of anisotropic exchange parameters

Magnetic susceptibilities are measured parallel and perpendicular to the unique axis of a single crystal of tetragonal TbRh2Si2 (14/mmm). Curie-Weiss behavior is observed in the temperature range 200–300 K for both orientations of the magnetic field, with the parameters: Xc(T): Cc = 13.25 K cm3 mol−1 (μeff = 10.3 μB/Tb3+), Θc = 50(5) K, and Xa(T): Ca = 13.7 K cm3mol−1 (μeff = 10.3, μB/Tb3+),gQa = −70(5) K. Using the general approach of Boutron …