Magnetocaloric materials exhibit temperature changes by an applied magnetic field. With this property, a magnetic cooling system using magnetocaloric materials as a coolant has been studied to replace the gas compression cooling system. Among the magnetic coolant candidates, Gadolinium (Gd) received a huge attention for its remarkable magnetocaloric properties, but it has problems in commercialization.[1,2]

In order to study materials that can replace Gd in the magnetic cooling system, the cooling characteristics that can be expressed when the material is charged into the system should be compared, but most studies have been conducted through indirect magnetic cooling characteristics evaluation of the material. In addition, because the cooling system is basically operated by cycle driving, maintaining the characteristics of the material in cycle driving is directly related to system efficiency.[3]

In this study, based on the MnFe(P, Si) composition material, which is one of the most promising magnetocaloric material candidates, the direct property evaluation as well as indirect magnetic cooling property evaluation to confirm the evaluation and maintenance of cooling characteristics by constructing a equipment that can measure magnetic cooling characteristics in cycle condition. Through this evaluation method, we conducted a study on whether our magnetocaloric material can actually have better magnetic cooling characteristics compared to other materials in the magnetic cooling system applications.[4.5]

References

[1] V.K. Pecharsky, et al. Phys. Rev. Lett. 78 (1997) 4494-4497

[2] A. Smith, et al. Adv. Energy Mater. 2 (2012) 1288-1319

[3] L. Griffith. et al. Energy Conversion and Management 199 (2019) 111948

[4] K.H. Kang, et al. J. Appl. Phys. 128 (2020) 223903

[5] K.H. Kang, et al. J. Alloys and Compounds 927 (2022) 167008