Berlin 2012 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 48: Joint Session Magnetic Shape Memory Alloys I (jointly with DS, MA)

MM 48.6: Vortrag

Donnerstag, 29. März 2012, 11:30–11:45, H 0106

Functional properties of magnetic Heusler alloys from an ab initio point of view — •Peter Entel, Mario Siewert, Markus E. Gruner, Heike C. Herper, and Sanjubala Sahoo — Faculty of Physics, University of Duisburg-Essen, 47048 Duisburg, Germany

Magnetic Heusler alloys exhibit complex magnetic phases and multiple intermediate martensitic structures. The strong interplay of magnetic and structural degrees of freedom is decisive for the functional properties associated with the magnetic shape-memory effect and the magneto-, elasto- and barocaloric effect. In this contribution we will discuss how the different functional properties arise from the complex spin interactions between the magnetic ions. We will show that this knowledge can be used to tune and optimize the various functional properties of the Heusler alloys as recently discussed for quaternary magnetic shape memory compounds [1].
[1] M. Siewert et al., Appl. Phys. Lett. 99, 191904 (2011).