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Engineered Gd-Co based multilayer stack to enhanced magneto-caloric effect and relative cooling power
- Source :
- Journal of Applied Physics, Journal of Applied Physics, American Institute of Physics, 2018, 123, pp.053902. ⟨10.1063/1.5004712⟩
- Publication Year :
- 2018
- Publisher :
- AIP Publishing, 2018.
-
Abstract
- International audience; Magnetic refrigeration based on the magneto-caloric effect is one of the best alternatives to compete with vapor-compression technology. The viability of a magnetic refrigeration system for magnetic cooling can be tested by exploiting the materials in various forms, ranging from bulk to nanostructured materials. In order to achieve a wide refrigerating temperature range in magnetic refrigeration, we study in this paper a 100 nm-thick Gd-Co alloys-based multilayer stack. The stack is made of four individual Gd-Co alloy layers with different values of concentration and Curie temperature (TC). A magnetic entropy change associated with the second-order magnetic phase transition was determined from the magnetic isotherms. Moreover, the relative cooling power (RCP) of the studied Gd-Co-based multilayer is enhanced compared to the one of bulk Gd, and reaches a value of 200 J/kg. Such an enhancement of the RCP is not due to an enhanced maximum variation of entropy, but this is due to a much broader magnetic entropy peak. This study demonstrates the potential of nanostructured Gd-Co multilayer stack for magnetic cooling applications.
- Subjects :
- 010302 applied physics
Materials science
Nanostructured materials
Alloy
General Physics and Astronomy
Thermodynamics
02 engineering and technology
Atmospheric temperature range
engineering.material
021001 nanoscience & nanotechnology
01 natural sciences
0103 physical sciences
Cooling power
Magnetic refrigeration
engineering
Magnetic phase transition
Curie temperature
[PHYS.COND]Physics [physics]/Condensed Matter [cond-mat]
0210 nano-technology
Subjects
Details
- ISSN :
- 10897550 and 00218979
- Volume :
- 123
- Database :
- OpenAIRE
- Journal :
- Journal of Applied Physics
- Accession number :
- edsair.doi.dedup.....9d7fcbe8d2e506f19caf2b2d04b5ef36