Blázquez, J. S. ; Franco, V. ; Conde, A. ; Gottschall, T. ; Skokov, K. P. ; Gutfleisch, O. (2016)
A unified approach to describe the thermal and magnetic hysteresis in Heusler alloys.
In: Applied Physics Letters, 109 (12)
doi: 10.1063/1.4963319
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Different excitations, like temperature, magnetic field, or pressure, can drive a martensitic transition in Heusler alloys. Coupled phenomena in these materials lead to interesting magnetocaloric and barocaloric effects ascribed to this transition. In this work, we demonstrate that isothermal transformations induced by a magnetic field and isofield transformations induced by the temperature can be described using the same framework. By defining an effective temperature that relates field and temperature through the properties of the system (magnetic moment and entropy of the transition), both kinds of loops can be transformed into the other kind, therefore providing a more effective way of characterizing hysteretic samples. The validity of this effective temperature approach to describe the transition holds for martensite to austenite transformations as well as reversal ones, and thus, the hysteresis phenomena can be described using this single general excitation.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2016 |
| Autor(en): | Blázquez, J. S. ; Franco, V. ; Conde, A. ; Gottschall, T. ; Skokov, K. P. ; Gutfleisch, O. |
| Art des Eintrags: | Bibliographie |
| Titel: | A unified approach to describe the thermal and magnetic hysteresis in Heusler alloys |
| Sprache: | Englisch |
| Publikationsjahr: | 2016 |
| Verlag: | AIP Publishing |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Applied Physics Letters |
| Jahrgang/Volume einer Zeitschrift: | 109 |
| (Heft-)Nummer: | 12 |
| DOI: | 10.1063/1.4963319 |
| Kurzbeschreibung (Abstract): | Different excitations, like temperature, magnetic field, or pressure, can drive a martensitic transition in Heusler alloys. Coupled phenomena in these materials lead to interesting magnetocaloric and barocaloric effects ascribed to this transition. In this work, we demonstrate that isothermal transformations induced by a magnetic field and isofield transformations induced by the temperature can be described using the same framework. By defining an effective temperature that relates field and temperature through the properties of the system (magnetic moment and entropy of the transition), both kinds of loops can be transformed into the other kind, therefore providing a more effective way of characterizing hysteretic samples. The validity of this effective temperature approach to describe the transition holds for martensite to austenite transformations as well as reversal ones, and thus, the hysteresis phenomena can be described using this single general excitation. |
| 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: | 24 Okt 2016 12:18 |
| Letzte Änderung: | 24 Okt 2016 12:18 |
| PPN: | |
| Sponsoren: | This work was supported by MINECO and EU FEDER (Project No. MAT2013-45165-P) and the PAI of the Regional Government of Andalucía., V. Franco also acknowledges funding from the Deutscher Akademischer Austauschdienst DAAD (Award No. A/13/09434)., T. Gottschall and O. Gutfleisch acknowledge funding from the DFG (SPP1599). |
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