Pressure-induced multicriticality and electronic instability in the quasi-kagome ferromagnet URhSn

We report an unconventional class of pressure induced quantum phase transition, possessing two bicritical points at 6.25 GPa in URhSn. This unique transformation accompanies a Fermi surface reconstruction, demarcating competing ordered phases suitably described with localized and itinerant description of the magnetic 5f-electrons. Ferromagnetic fluctuations over a wide range of temperatures and pressures in the pressure-induced low temperature phase are evidenced by a robust T 5/3 temperature dependence of resistivity up to 11 GPa, which is a characteristic of elusive marginal Fermi-liquid state.