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Irreversible dynamics of the phase boundary in U(Ru0.96Rh0.04)2Si2 and implications for ordering.

  • Author(s): Silhanek, AV
  • Jaime, M
  • Harrison, N
  • Fanelli, VR
  • Batista, CD
  • Amitsuka, H
  • Nakatsuji, S
  • Balicas, L
  • Kim, KH
  • Fisk, Z
  • Sarrao, JL
  • Civale, L
  • Mydosh, JA
  • et al.
Abstract

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)2Si2, which yield irreversible properties similar to those at the valence transition of Yb(1-x)Y(x)InCu4. 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.

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