What is it about?
It is estimated that refrigeration and cooling technologies are responsible for about 10% of carbon dioxide emissions all around the world. Researcher's focus on alternative cooling technologies like magnetocaloric devices which are fast growing. Gadolinium (Gd) is one of the most extensively studied elements for magnetocaloric applications due to its significant change in magnetocaloric entropy near room temperature (293 K), and it undergoes second order magnetic phase transition. However, pure Gd is expensive and difficult to mold it into useful forms as an active magnetic refrigerator (AMR). In this regard, we focus on Gd based transition metal thin films to tailor large magnetocaloric effect over a broad temperature range, making the material suitable for practical applications.
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Why is it important?
We report table like magnetocaloric effect, for the first time, in GdFeCo thin films with a wide range of operating temperature (60 K) which suits for room temperature Ericsson-cycle magnetic regenerative refrigeration.
Perspectives
Working on magnetocaloric effect of thin films is challenging because of optimization of deposition conditions. Without continuous involvement of my co-authors, this work would not be feasible, and I appreciate their cooperation.
Jagadish Kumar G
East China University of Technology
Read the Original
This page is a summary of: Broad table-like magnetocaloric effect in GdFeCo thin-films for room temperature Ericsson-cycle magnetic refrigeration, Journal of Applied Physics, March 2024, American Institute of Physics,
DOI: 10.1063/5.0191497.
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