We present specific heat and resistivity study of CeIrIn5 in magnetic fields up to 17 T and temperature down to 50 mK. Both quantities were measured with the magnetic field parallel to the c-axis (H || [001]) and within the a-b plane (H \perp [001]). Non-Fermi-liquid (NFL) behavior develops above 12 T for H || [001]. The Fermi liquid state is much more robust for H \perp [001] and is suppressed only moderately at the highest applied field. Based on the observed trends and the proximity to a metamagnetic phase transition, which exists at fields above 25 T for H || [001], we suggest that the observed NFL behavior in CeIrIn5 is a consequence of a metamagnetic quantum critical point.
@article{arxiv.cond-mat/0404333,
title = {Non-Fermi Liquid behavior in CeIrIn$_5$ near a metamagnetic transition},
author = {C. Capan and A. Bianchi and F. Ronning and A. Lacerda and J. D. Thompson and P. G. Pagliuso and J. L. Sarrao and R. Movshovich},
journal= {arXiv preprint arXiv:cond-mat/0404333},
year = {2009}
}
Comments
5 pages, 4 figures, submitted to Phys. Rev. Letters