Aksoy, Seda; Acet, Mehmet; Krenke, Thorsten; Wassermann, Eberhard; Gruner, Markus Ernst; Entel, Peter; Manosa, Lluis; Planes, Antoni; Deen, Pascale P.:
Magnetic Interactions Governing the Inverse Magnetocaloric Effect in Martensitic Ni–Mn-Based Shape-memory Alloys
In: Disorder and Strain-Induced Complexity in Functional Materials / Kakeshita, Tomoyuki; Fukuda, Takashi; Saxena, Avadh; Planes, Antoni (Hrsg.). - Heidelberg: Springer, 2012 - (Springer Series in Materials Science ; 148), S. 67 - 77
Buchaufsatz/Kapitel in Sammelwerk / Fach: Physik
Fakultät für Physik » Experimentalphysik
Titel:
Magnetic Interactions Governing the Inverse Magnetocaloric Effect in Martensitic Ni–Mn-Based Shape-memory Alloys
Autor(in):
Aksoy, Seda im Online-Personal- und -Vorlesungsverzeichnis LSF anzeigen; Acet, Mehmet im Online-Personal- und -Vorlesungsverzeichnis LSF anzeigen; Krenke, Thorsten im Online-Personal- und -Vorlesungsverzeichnis LSF anzeigen; Wassermann, Eberhard im Online-Personal- und -Vorlesungsverzeichnis LSF anzeigen; Gruner, Markus Ernst im Online-Personal- und -Vorlesungsverzeichnis LSF anzeigen; Entel, Peter im Online-Personal- und -Vorlesungsverzeichnis LSF anzeigen; Manosa, Lluis; Planes, Antoni; Deen, Pascale P.
Erscheinungsjahr
2012
Erschienen in:
Disorder and Strain-Induced Complexity in Functional Materials / Kakeshita, Tomoyuki; Fukuda, Takashi; Saxena, Avadh; Planes, Antoni (Hrsg.). - Heidelberg: Springer, 2012 - (Springer Series in Materials Science ; 148), S. 67 - 77
ISBN
DOI

Abstract:

Ni–Mn–X Heusler-type alloys (X: group IIIB–VB elements) undergo martensitic transformations, and many of them exhibit magnetic shape-memory and field-induced effects, one of the most predominant being the inverse magnetocaloric effect. To understand the cause of the inverse magnetocaloric effect, which involves a magnetic entropy increase with applied field, it is necessary to understand the nature of the magnetic coupling in the temperature vicinity of the martensitic transition.We present results on neutron polarization analysis experiments on Ni–Mn-based martensitic Heusler systems, with which we show that around Ms the magnetic short-range correlations at temperatures T<Ms are antiferromagnetic. We discuss the relationship of the magnetic coupling and the inverse magnetocaloric effect.