Weyl nodal lines (“vile”) may explain why this phenomenon emerges at low temperatures in Y-sub-2-C electride. Temperature-independent peaks named for this phenomenon have been detected in hexagonal crystals like tungsten di·selenide. Considering second-order corrections from the Zeeman interaction allows one to derive a temperature-independent form of this phenomenon. (10[2])A function that models this phenomenon contains two hyperbolic cosine terms and simplifies when J is infinite. (-5[1])This non-Brownian motion phenomenon is modeled by the Langevin (10[1]-5[1])(“lanj-VAYN”) function, (-5[1])which is the classical limit (-5[1])of the Brillouin (“bree-WANN”) equation. The susceptibility (-5[1])of materials displaying (10[1])this phenomenon is C over the quantity “T minus T-sub-c” by the Curie–Weiss law. For 10 points, (-5[1])name this phenomenon where a material is weakly attracted (10[1]-5[1])by a magnetic field, (10[3])contrasted (-5[1])with dia·magnetism. (10[3])■END■ (10[8]0[1])