Verification of the Phenomenological Model's Validity for the Conventional and Inverse Magnetocaloric Effects in Ni50Mn34In16

The purpose of this research is to evaluate the validity and reliability of a phenomenological model (PM) for the magnetocaloric effect (MCE) in Ni50Mn34In16. By simulating the MCE of Ni50Mn34In16 at temperatures ranging from 190 to 330 K, our work verifies PM for both inverse and conventional MCEs. Interestingly, substantial agreement between measured and simulated magnetic entropy change is obtained across the whole temperature range. Furthermore, there is a satisfactory agreement between the measured and computed absolute values of temperature change (|triangle T|) of conventional MCE and portion inverse MCE region temperature greater than critical temperature (T-C). However, due to the latent heat during the martensitic transition in Ni50Mn34In16, the measured |triangle T| becomes smaller than the simulated one in the inverse MCE area, which is less than the T-C of the AFM state. These findings suggest that PM is a reliable model for exploring both inverse and conventional MCEs in the same sample, saving time and effort in computing and measuring MCE.