We report measurements and analysis of the specific heat and magnetocaloric effect at the phase boundary into the single magnetic field-induced phase (phase II) of U(Ru{0.96}Rh{0.04})2Si2, which yield striking similarities to the valence transition of Yb{1-x}YxInCu4. To explain these similarities, we propose a bootstrap mechanism by which a structural distortion causes an electric quadrupolar order parameter within phase II to become coupled to the 5f-electron hybridization, giving rise to a valence change at the transition.
@article{arxiv.cond-mat/0507484,
title = {Irreversible dynamics of the phase boundary in U(Ru0.9)Rh0.04)2Si2 and implications for ordering},
author = {A. V. Silhanek and M. Jaime and N. Harrison and V. Fanelli and C. D. Batista and H. Amitsuka and S. Nakatsuji and L. Balicas and K. H. Kim and Z. Fisk and J. L. Sarrao and L. Civale and J. A. Mydosh},
journal= {arXiv preprint arXiv:cond-mat/0507484},
year = {2009}
}