Kaeswurm, B. ; Franco, V. ; Skokov, K. P. ; Gutfleisch, O. (2016)
Assessment of the magnetocaloric effect in La,Pr(Fe,Si) under cycling.
In: Journal of Magnetism and Magnetic Materials, 406
doi: 10.1016/j.jmmm.2016.01.045
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The response of a magnetocaloric material to periodic variations of magnetic field and temperature corresponding to those occurring during a magnetic refrigeration process is studied. A series of simple measurement protocols are suggested which are used to obtain a value for the cyclic response of the magnetic entropy change associated with the magnetic transition. The entropy values are compared to direct measurements of the temperature change under adiabatic conditions. The procedure is illustrated on the first order magnetocaloric material La0.6Pr0.4Fe11.6Si1.4 and provides a basis for comparison of the suitability of different hysteretic magnetocaloric materials for application in a magnetic refrigerator. For the alloy studied here the peak magnetic entropy change of -28 +/- 11 kg(-1) K-1 in a field change of 2 T is not affected by cycling, but the full width at half maximum of the peak decreases from 8.7 K to 3.8 K. (C) 2016 Elsevier B.V. All rights reserved.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2016 |
| Autor(en): | Kaeswurm, B. ; Franco, V. ; Skokov, K. P. ; Gutfleisch, O. |
| Art des Eintrags: | Bibliographie |
| Titel: | Assessment of the magnetocaloric effect in La,Pr(Fe,Si) under cycling |
| Sprache: | Englisch |
| Publikationsjahr: | 15 Mai 2016 |
| Verlag: | ELSEVIER SCIENCE BV |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Magnetism and Magnetic Materials |
| Jahrgang/Volume einer Zeitschrift: | 406 |
| DOI: | 10.1016/j.jmmm.2016.01.045 |
| Kurzbeschreibung (Abstract): | The response of a magnetocaloric material to periodic variations of magnetic field and temperature corresponding to those occurring during a magnetic refrigeration process is studied. A series of simple measurement protocols are suggested which are used to obtain a value for the cyclic response of the magnetic entropy change associated with the magnetic transition. The entropy values are compared to direct measurements of the temperature change under adiabatic conditions. The procedure is illustrated on the first order magnetocaloric material La0.6Pr0.4Fe11.6Si1.4 and provides a basis for comparison of the suitability of different hysteretic magnetocaloric materials for application in a magnetic refrigerator. For the alloy studied here the peak magnetic entropy change of -28 +/- 11 kg(-1) K-1 in a field change of 2 T is not affected by cycling, but the full width at half maximum of the peak decreases from 8.7 K to 3.8 K. (C) 2016 Elsevier B.V. All rights reserved. |
| Freie Schlagworte: | Magnetocaloric effect, Phasetransition, La(FeSi)(13), Ferromagnetism, Entropy change, Adiabatic entropy change |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Funktionale Materialien |
| Hinterlegungsdatum: | 11 Mai 2016 12:35 |
| Letzte Änderung: | 31 Jan 2019 15:14 |
| PPN: | |
| Sponsoren: | B.K. acknowledges funding from the European Community's Seventh Framework Programme FP 7/2007-2013 under Grant Agreement no. 310748 (DRREAM)., O.G. acknowledges funding from the DFG Priority Program (SPP 1599, GU 514/3-1)., V.F. acknowledges funding from the Deutscher Akademischer Austauschdienst DAAD Award A/13/09434, Spanish MINECO and EU FEDER (Project MAT2013-45165-P), and the PAI of the Regional Government of Andalucia. |
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