Irreversible dynamics of the phase boundary in U(Ru0.96Rh0.04)(2)Si-2 and implications for ordering
Silhanek, Alejandro × Jaime, M Harrison, N Fanelli, VR Batista, CD Amitsuka, H Nakatsuji, S Balicas, L Kim, KH Fisk, Z Sarrao, JL Civale, L Mydosh, JA #
American physical soc
Physical review letters vol:96 issue:13 pages:1-4
We report measurements and analysis of the specific heat and magnetocaloric effect-induced temperature changes at the phase boundary into the single magnetic field-induced phase (phase II) of U(Ru0.96Rh0.04)(2)Si-2, which yield irreversible properties similar to those at the valence transition of Yb1-xYxInCu4. To explain these similarities, we propose a bootstrap mechanism by which lattice parameter changes caused by an electric quadrupolar order parameter within phase II become coupled to the 5f-electron hybridization, giving rise to a valence change at the transition.