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We have employed a magnetic field angle as a tuning parameter in acomprehensive measurement of the specific heat, magnetocaloric effect, andmagnetization for the quasi-kagome Kondo lattice CeRhSn, which is considered toexhibit zero-field quantum criticality driven by geometrical frustration. Byconstructing the field-angle-resolved landscape of the entropy, we unexpectedlyrevealed that the non-Fermi-liquid nature survives up to a metamagneticcrossover field of roughly 3 T in the very narrow field-orientation range,close to the direction parallel to the quasi-kagome plane. We propose that spinfluctuations along the hexagonal $c$ axis are the dominant driving force forthe non-Fermi-liquid behavior because it is strongly suppressed by amagnetic-field component along the $c$ axis. The multidimensional entropylandscape, which directly reflects the degeneracy of ground states, opens a newroute for uncovering the nature of exotic phases in anisotropic systems.

Field-angle-resolved landscape of non-Fermi-liquid behavior in the quasi-kagome Kondo Lattice CeRhSn