Abstract
We have performed the electrical resistivity measurement on single crystal heavy fermion compounds YbT2Zn20 (T = Co, Rh, Ir) under pressure up to 12 GPa. A pronounced resistivity maximum Tmax, which scales with the Kondo temperature, develops with increasing pressure. In the case of YbCo2Zn20, Tmax initially decreases with increasing pressure, reaches a minimum around 1 GPa, above which the pressure-induced magnetic ordering emerges at low temperature. For YbRh2Zn20 and YbIr2Zn20, Tmax also exhibits a minimum at approximately 3 GPa, suggesting the appearance of pressure-induced magnetic transition below 2 K. Our results indicate the proximity to a magnetic instability in YbT2Zn20 systems at ambient pressure.
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