under pressure*

YbFe₂Zn₂₀ is one of six closely related heavy fermion compounds, YbT₂Zn₂₀ (T = Fe, Ru, Os, Co, Rh, Ir) [1] with the Sommerfeld coefficient γ > 500 mJ/mol K² and Kondo temperature T_K ~ 35 K. Recent measurements under pressure up to ~8 GPa show strong suppression of T_K and Fermi-liquid region [2]. We report measurements of electrical resistivity of YbFe₂Zn₂₀ single crystals in zero and applied magnetic field under pressures up to ~25 GPa. The data suggest transition from heavy fermion to magnetically ordered ground state under pressure. Possible nature of the magnetic order will be discussed based on the measurements in magnetic field and comparison with the other members of the family.
[1] M.S. Torikachvili et al., PNAS 104 (2007) 9960.
[2] S. K. Kim, et al., Phys. Rev. B 88 (2013) 045116.