STUDENT SEMINAR
Krishna Kaushik
Topic: Molecule Based Magnetic Coolers
Date & Time: 3rd February 2022 at 4.00 p.m. through MICROSOFT TEAMS
Microsoft Teams Link:
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Abstract:
In the modern society, refrigeration has become an increasingly essential technology, with applications ranging from the food industry, health care to the energy sector. Currently, the predominant refrigeration technology is vapor compression (VC) refrigeration where environmentally harmful gas refrigerants have been used. Refrigerants such as hydrofluorocarbons (HFCs) have a global warming potential (GWP) larger than 1000 and its release to the environment contributes mainly to global warming. Due to the severe situation of environmental pollution and energy shortage, the study of magnetic refrigerant materials with significant magnetocaloric effects (MCEs) have attracted much attention during the last decade. MCE is based on the change of the magnetic entropy upon application of a magnetic field. Technologies based on MCEs can be used for cooling applications according to a process known as adiabatic demagnetization. In this presentation, I will discuss the overview of the developments in designing low-temperature magnetic refrigerants based on MCE, and recent advancements of new materials that can perform better than the traditional magnetic coolants.
References:
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- Chen, W. P.; Liao, P. Q.; Jin, P. B.; Zhang, L.; Ling, B. K.; Wang, S. C., Chan, Y. T.; Chen, X. M.; Zheng, Y. Z. The gigantic {Ni36Gd102} hexagon: A sulfate-templated “Star-of David” for photocatalytic CO2 reduction and magnetic cooling. J. Am. Chem. Soc. 2020, 142, 4663.
- Terada, N.; Mamiya, H. High-efficiency magnetic refrigeration using holmium. Nat. Commun. 2021, 12, 1212.
- Zheng, X. Y.; Kong, X. J.; Zheng, Z.; Long, L. S.; Zheng, L. S. High-nuclearity lanthanide-containing clusters as potential molecular magnetic coolers. Acc. Chem. Res. 2018, 51, 51