We have investigated the critical behavior of a shandite-type half-metal ferromagnet Co3Sn2S2. It exhibits a second-order paramagnetic-ferromagnetic phase transition with TC = 174 K. To investigate the nature of the magnetic phase transition, a detailed critical exponent study has been performed. The critical components beta, gamma, and delta determined using the modified Arrott plot, the Kouvel-Fisher method as well as the critical isotherm analysis are match reasonably well and follow the scaling equation, confirming that the exponents are unambiguous and intrinsic to the material. The determined exponents of Co3Sn2S2 deviates from theoretical estimated short-range universal models. Instead, Co3Sn2S2 exhibits long-range order in the nature of magnetic interaction with the spin decay as J(r) ~ 1/r^[-(d + sigma)] with sigma = 1.28.
@article{arxiv.1801.08048,
title = {Critical behaviors of half-metallic ferromagnet Co3Sn2S2},
author = {Weinian Yan and Xiao Zhang and Qi Shi and Xiaoyun Yu and Zhiqing Zhang and Qi Wang and Si Li and Hechang Lei},
journal= {arXiv preprint arXiv:1801.08048},
year = {2018}
}