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Systematic investigation of Mn substituted La(Fe,Si)13 alloys and their hydrides for room-temperature magnetocaloric application

Krautz, Maria ; Skokov, Konstantin ; Gottschall, Tino ; Teixeira, Cristiano S. ; Waske, Anja ; Liu, Jian ; Schultz, Ludwig ; Gutfleisch, Oliver (2014)
Systematic investigation of Mn substituted La(Fe,Si)13 alloys and their hydrides for room-temperature magnetocaloric application.
In: Journal of Alloys and Compounds, 598
doi: 10.1016/j.jallcom.2014.02.015
Artikel, Bibliographie

Kurzbeschreibung (Abstract)

Fully hydrogenated Mn containing LaFeSi alloys provide long time stability of attractive magnetocaloric properties; issues of previously reported induced phase co-existence can be avoided. In this paper, two series LaFe11.8−xSi1.2Mnx and LaFe11.6−xSi1.4Mnx (x = 0, 0.1, 0.2, 0.3, 0.4), before and after hydrogenation are presented. In the non-hydrogenated parent samples, microstructural evolution and phase formation with increasing Mn content are studied. It is found that materials combination within the sample series can provide constant MCE over a large working temperature range. As a peculiarity, the hydrogenated compounds show a different dependence of the transition temperature as a function of Si content than the parent compounds. This behaviour is explained by comparing the amount of hydrogen incorporated in samples with different Si content. Moreover, an estimation for the maximum adiabatic temperature change and optimal magnetic field is given exemplarily for a non-hydrogenated and a hydrogenated compound.

Typ des Eintrags: Artikel
Erschienen: 2014
Autor(en): Krautz, Maria ; Skokov, Konstantin ; Gottschall, Tino ; Teixeira, Cristiano S. ; Waske, Anja ; Liu, Jian ; Schultz, Ludwig ; Gutfleisch, Oliver
Art des Eintrags: Bibliographie
Titel: Systematic investigation of Mn substituted La(Fe,Si)13 alloys and their hydrides for room-temperature magnetocaloric application
Sprache: Englisch
Publikationsjahr: 15 Juni 2014
Verlag: Elsevier Science Publishing
Titel der Zeitschrift, Zeitung oder Schriftenreihe: Journal of Alloys and Compounds
Jahrgang/Volume einer Zeitschrift: 598
DOI: 10.1016/j.jallcom.2014.02.015
Kurzbeschreibung (Abstract):

Fully hydrogenated Mn containing LaFeSi alloys provide long time stability of attractive magnetocaloric properties; issues of previously reported induced phase co-existence can be avoided. In this paper, two series LaFe11.8−xSi1.2Mnx and LaFe11.6−xSi1.4Mnx (x = 0, 0.1, 0.2, 0.3, 0.4), before and after hydrogenation are presented. In the non-hydrogenated parent samples, microstructural evolution and phase formation with increasing Mn content are studied. It is found that materials combination within the sample series can provide constant MCE over a large working temperature range. As a peculiarity, the hydrogenated compounds show a different dependence of the transition temperature as a function of Si content than the parent compounds. This behaviour is explained by comparing the amount of hydrogen incorporated in samples with different Si content. Moreover, an estimation for the maximum adiabatic temperature change and optimal magnetic field is given exemplarily for a non-hydrogenated and a hydrogenated compound.

Freie Schlagworte: Magnetocaloric, Transition metal, Interstitial alloys, Hydrogen absorption, Magnetic refrigeration
Fachbereich(e)/-gebiet(e): 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Funktionale Materialien
11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft
11 Fachbereich Material- und Geowissenschaften
Hinterlegungsdatum: 31 Mär 2014 08:15
Letzte Änderung: 31 Mär 2014 08:15
PPN:
Sponsoren: Funding by BMBF within the VIP Program “Neuartige magnetokalorische Maschine für Kühl – und Heizanwendungen“ is gratefully acknowledged.
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