Investigation of thermo-magnetic properties in Ni-nanoparticles and Ni-PVA composites

To simulate the magnetocaloric effect (MCE) of Ni-nanoparticles and Ni-PVA composites, a phenomenological model-(PM) is used. The MCE parameters of Ni-nanoparticles and Ni-PVA composites are calculated as the results of magnetization vs. temperature simulations. The cryogenic temperature range of MCE in Ni-nanoparticles and Ni-PVA composites is 10 to 40 K. Furthermore, Ni-nanoparticles serve important roles in tailoring the specific heat variability and changing the temperature range that covers this variation. In comparison, the MCE parameters of Ni-nanoparticles and Ni-PVA composites are therefore larger than the various MCE parameters of some published MC samples. It is stated that Ni-nanoparticles and Ni-PVA composites could be utilized in effective cryogenic MR as MC magnets.