Magnetocaloric effect in ErNi2 melt-spun ribbons
| Autor: | Pablo Álvarez-Alonso, C.F. Sánchez-Valdés, J.L. Sánchez Llamazares, D. Ríos-Jara, P. J. Ibarra-Gaytan |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Condensed matter physics Scanning electron microscope 02 engineering and technology General Chemistry Laves phase 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Magnetic field Magnetization Geochemistry and Petrology Magnetic refrigeration Curie temperature Melt spinning 0210 nano-technology Adiabatic process |
| Zdroj: | RUO. Repositorio Institucional de la Universidad de Oviedo instname |
| ISSN: | 1002-0721 |
| Popis: | ErNi2 ribbons were produced by rapid solidification using the melt spinning technique. Their structural, magnetic and magnetocaloric properties in the as-solidified state were studied by X-ray diffraction, scanning electron microscopy, magnetization and specific heat measurements. Samples are single phase with the MgCu2-type crystal structure, a Curie temperature TC of 6.8 K and a saturation magnetization at 2 K and 5 T of 124.0 A⋅m2/kg. For a magnetic field change μ0ΔH of 5 T (2 T) ribbons show a maximum magnetic entropy change |ΔSMpeak| of 24.1 (16.9) J/(kg⋅K), and an adiabatic temperature change ΔTadmax of 8.1 (4.4) K; this is similar to the previously reported literature for bulk alloys that were processed through conventional melting techniques followed by prolonged thermal annealing. In addition, the samples also show slightly wider ΔSM(T) curves with respect to bulk alloys leading to a larger refrigerant capacity. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect