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Published on: May 2, 2016
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A multicaloric material as a link between electrocaloric and magnetocaloric refrigeration
Hana Ursic1, Vid Bobnar1, Barbara Malic1
1Jožef Stefan Institute, Jamova cesta 39, 1000 Ljubljana, Slovenia.
Scientific Reports
|May 26, 2016
Summary
This study demonstrates a novel multicaloric material, 0.8Pb(Fe1/2Nb1/2)O3-0.2Pb(Mg1/2W1/2)O3, showing significant magnetocaloric and electrocaloric effects. This material enables versatile cooling applications through its unique caloric properties.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Thermodynamics
Background:
- Multicaloric materials offer potential for advanced cooling technologies.
- Simultaneous magnetocaloric and electrocaloric effects are desirable for versatile applications.
Purpose of the Study:
- To demonstrate the existence and feasibility of a novel multicaloric material.
- To characterize the magnetocaloric and electrocaloric properties of 0.8Pb(Fe1/2Nb1/2)O3-0.2Pb(Mg1/2W1/2)O3.
- To explore the potential for multicaloric cooling modes.
Main Methods:
- Synthesis of the polycrystalline material 0.8Pb(Fe1/2Nb1/2)O3-0.2Pb(Mg1/2W1/2)O3.
- Experimental measurement of magnetocaloric effect (MCE) using varying magnetic fields.
- Experimental measurement of electrocaloric effect (ECE) using varying electric fields.
Main Results:
- The material exhibits both magnetocaloric and electrocaloric effects below room temperature.
- Maximum MCE of ~0.26 K achieved at 5 K with 70 kOe.
- Maximum ECE of ~0.25 K achieved at 180 K with 60 kV/cm.
Conclusions:
- The demonstrated material is a viable candidate for multicaloric cooling applications.
- The material's properties allow for separate or combined caloric-mode operations.
- Further research can explore optimizing these effects for practical cooling devices.
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