On Hysteresis and Magnetocaloric Effect in CoS\(_{1.76}\)Se\(_{0.24}\)

The path dependence of the magnetocaloric effect (MCE) in CoS \(_{1.76}\) ${}_{1.76}$ Se \(_{0.24}\) ${}_{0.24}$ has been studied. A field-induced paramagnetic (PM)-ferromagnetic (FM) transition results in 4.6 J/kg-K peak value of isothermal entropy change ( \(\Delta\) $\mathrm{\Delta }$ S \(_{th}\) ${}_{\mathit{th}}$ ) for 90 kOe field change. Above 10 K, the temperature dependence of \(\Delta\) $\mathrm{\Delta }$ S \(_{th}\) ${}_{\mathit{th}}$ calculated from the forward curve (0 kOe–90 kOe) and that calculated from the reverse curve (90 kOe–0 kOe) are found to be similar, whereas at lower temperature, contrasting behaviour is observed due to the kinetic arrest of first-order magnetic transition.