We report specific heat, resistivity and susceptibility measurements at different temperatures, magnetic fields, and pressures to provide solid evidence of CoS2 being a marginal Fermi liquid. The presence of a tricritical point in the phase diagram of the system provides an opportunity to test the spin fluctuation theory with a high limit of accuracy. A magnetic field suppresses the amplitude of the spin fluctuations and recovers conventional Fermi liquid behavior, connecting both states continuously.
@article{arxiv.0806.2819,
title = {Identification of a Marginal Fermi-Liquid in Itinerant Ferromagnet CoS2},
author = {M. Otero-Leal and F. Rivadulla and M. Garcia-Hernandez and A. Pineiro and V. Pardo and D. Baldomir and J. Rivas},
journal= {arXiv preprint arXiv:0806.2819},
year = {2009}
}