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Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
Published on: June 9, 2023
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A universal metric for ferroic energy materials
Ekkes Brück1, Hargen Yibole2, Lian Zhang3
1Fundamental Aspects of Materials and Energy, Department of Radiation Science and Technology, Faculty of Applied Sciences, Delft University of Technology, Mekelweg 15, 2629 JB Delft, The Netherlands e.h.bruck@tudelft.nl.
Summary
Researchers propose a new metric, the coefficient of refrigerant performance, to evaluate hysteresis losses in magnetocaloric materials for magnetic refrigeration. This helps minimize energy losses in first-order phase transitions for practical applications.
Area of Science:
- Materials science
- Thermodynamics
- Solid-state physics
Background:
- Intensive research on magnetocaloric effects near room temperature has advanced magnetic refrigeration towards practical applications.
- First-order magnetocaloric materials are key candidates for multicaloric devices, but hysteresis in phase transitions poses challenges.
- A universal metric is needed to quantify the detrimental effects of hysteresis in ferroic materials.
Purpose of the Study:
- To introduce and define the coefficient of refrigerant performance (CRP) as a universal metric for evaluating ferroic materials.
- To assess the impact of hysteresis on the efficiency of magnetic refrigeration systems.
- To explore strategies for minimizing losses in first-order magnetocaloric materials.
Main Methods:
- Proposed the coefficient of refrigerant performance (CRP) as a metric comparing reversible cycle work to positive refrigerant work.
- Focused analysis on magnetocaloric materials and one barocaloric experiment due to data limitations.
- Examined the influence of field-induced transitions and hysteresis on energy losses.
Main Results:
- The coefficient of refrigerant performance (CRP) is presented as a universal metric for ferroic materials.
- Adjusting field-induced transitions and hysteresis can significantly minimize losses in first-order materials.
- The study highlights the importance of managing hysteresis for efficient magnetic refrigeration.
Conclusions:
- The coefficient of refrigerant performance (CRP) offers a standardized way to evaluate materials for magnetic refrigeration.
- Optimizing phase transitions and minimizing hysteresis are crucial for the practical application of first-order magnetocaloric materials.
- Further research, particularly on electrocaloric materials, is needed to fully leverage multicaloric devices.
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