Anisotropic spin fluctuations in cubic CeSn3

The low-temperature high-field heat capacity of a Ce${\mathrm{Sn}}_3$ single crystal was found to develop an anisotropy for $H>\mathrm{}2.50\mathrm{}$ T with the magnetic field parallel to the [100] and [110] directions. The magnetic susceptibility of Ce${\mathrm{Sn}}_3$ below 5 K was also anisotropic with ${\chi }_{110}>{\chi }_{100}$ by ∼ 5% at 1.8 K. For the first time ever an anisotropic quenching of spin fluctuations in any highly enhanced paramagnet has been observed.