Critical behavior and magnetocaloric effect in magnetic Weyl semimetal candidate Co_2-xZrSn

We investigate the critical exponents and magnetocaloric effect of Co_2-xZrSn polycrystal. The Co_2-xZrSn undergoes a second-order ferromagnetism phase transition around the Curie temperature of T_c~280 K. The critical behavior in the vicinity of the magnetic phase transition has been investigated by using modified Arrott plot and Kouvel-Fisher methods. The obtained critical exponents, β, γ, and δ can be well described by the scaling theory. The determined exponents of Co_2-xZrSn obey the mean-field model with a long-range magnetic interaction. In addition, the maximum magnetic entropy change -ΔS_M^max of Co_2-xZrSn is about 0.57 J·kg^-1·K^-1 and the relative cooling power (RCP) is 14.68 J·kg^-1 at 50 kOe (1 Oe=79.5775 A·m^-1).