The Magnetocaloric Composite Designed by Multi‐Gd‐Al‐Co Microwires with Close Performances
[2];
- School of Materials Science and Engineering Harbin Institute of Technology Harbin 150001 P. R. China, Department of Physics University of South Florida Tampa, Florida 33620 USA
- School of Materials Science and Engineering Harbin Institute of Technology Harbin 150001 P. R. China
- School of Materials Science and Engineering Inner Mongolia University of Technology No. 49 Aimin Street Hohhot 010051 P. R. China
- Department of physics Qiqihar University Qiqihar 161006 P. R. China
- Department of Physics University of South Florida Tampa, Florida 33620 USA
A new magnetocaloric composite composed of three types of soft ferromagnetic Gd‐based microwires with equal mass ratio and close magnetocaloric performances is designed. The Curie temperatures ( T C ) of these three wires are ≈97, ≈100, and ≈101 K, respectively. However, the magnetization versus temperature curve of the composite sample shows almost a single ferromagnetic–paramagnetic transition at ≈97 K. For a field change of µ 0 Δ H = 5 T, the maximum entropy change () and refrigerant capacity (RC) of this composite are calculated to be ≈9.98 J kg −1 K −1 and ≈665 J kg −1 , respectively. There is a good agreement between the calculated −Δ S M ( T ) curve and the experimental data, indicating weak magnetic interactions among different wire compositions. Additionally, the calculated universal master curves of the composite and its Gd‐Al‐Co components are fitted very well, which reveals the second‐order type of the magnetic transition for the composite. The designed composite integrates all magnetocaloric properties of its components, suggesting that the Gd‐based amorphous wires with close magnetocaloric properties can be designed as an excellent refrigerant for use in active magnetic refrigerators.
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- DE‐FG02‐07ER 46438
- OSTI ID:
- 1512823
- Journal Information:
- Physica Status Solidi. A, Applications and Materials Science, Journal Name: Physica Status Solidi. A, Applications and Materials Science Vol. 216 Journal Issue: 16; ISSN 1862-6300
- Publisher:
- Wiley Blackwell (John Wiley & Sons)Copyright Statement
- Country of Publication:
- Germany
- Language:
- English
Web of Science
Similar Records
Enhanced refrigerant capacity in Gd-Al-Co microwires with a biphase nanocrystalline/amorphous structure
Enhanced magnetocaloric performance in nanocrystalline/amorphous Gd3Ni/Gd65Ni35 composite microwires