Enhancement of the magnetocaloric effect in composites: Experimental validation |
| |
| Authors: | SC Paticopoulos R Caballero-Flores V Franco JS Blázquez A Conde KE Knipling MA Willard |
| |
| Institution: | 1. Dpto. Física de la Materia Condensada, ICMSE-CSIC, Universidad de Sevilla, P.O. Box 1065, 41080 Sevilla, Spain;2. Multifunctional Materials Branch. US Naval Research Laboratory, 4555 Overlook Ave. SW, Washington, District of Columbia 20375, USA;1. Institute of Physics, Cz?stochowa University of Technology, 19 Armii Krajowej Av., Cz?stochowa, Poland;2. Department of Mechanics, Materials Science and Engineering, Wroc?aw University of Science and Technology, 25 Smoluchowskiego Str., Wroc?aw 50-370, Poland;1. International Laboratory of High Magnetic Fields and Low Temperatures, PAS, 53-421 Wroclaw, Poland;2. Lomonosov Moscow State University, Faculty of Physics, 119991 Moscow, Russian Federation;3. Institute of Low Temperatures and Structure Research, PAS, 50-950 Wroclaw, Poland;1. Institut für Materialwissenschaft, TU Darmstadt, 64287 Darmstadt, Germany;2. NUST MISiS, Leninskiy Pr.4, 119991 Moscow, Russia;3. Chelyabinsk State University, Faculty of Physics, 45400 Chelyabinsk, Russia;4. Fraunhofer ISC, IWKS Group Materials, Recycling and Resource Strategy, 63457 Hanau, Germany;1. Key Laboratory of Integrated Exploitation of Bayan Obo Multi-Metal Resources, Inner Mongolia University of Science and Technology, Baotou 014010, China;2. School of Mathematics, Physics and Biological Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, China |
| |
| Abstract: | Recent calculations have shown that the refrigerant capacity (RC) of magnetic refrigerants can be enhanced using multiphase materials or composites, which expand the temperature range over which a significant magnetic entropy change can be obtained. This work is a systematic experimental validation of the improvement of RC (RCI) using layered composites comprised of two Fe88?2yCoyNiyZr7B4Cu1 amorphous alloy constituents, with y=8.25 and y=11 compositions. RCI has a nonmonotonic dependence on the applied magnetic field H and the fraction x of the two constituent phases. In contrast to common assumptions, the composite has a smaller RCI than its constituent phases for small values of H and x, and there are critical values of each for which RCI is maximized. This work demonstrates the outstanding agreement between the experimental results and the continuous curves predicted by numerical calculations, indicating that this approach can be used to design magnetic refrigerant materials with enhanced magnetocaloric response for moderate magnetic fields. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
