Berlin 2015 – scientific programme

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MM: Fachverband Metall- und Materialphysik

MM 16: Functional materials III: Sensors and Actuators

MM 16.6: Talk

Monday, March 16, 2015, 17:15–17:30, TC 010

Deformation characteristics and phase transitions in Fe₇Pd₃ thin films — •Alina J. Bischoff^1,2 and Stefan G. Mayr^1,2,3 — ¹Leibniz-Institut für Oberflächenmodifizierung, Leipzig — ²Translationszentrum für Regenerative Medizin, Leipzig — ³Fakultät für Physik und Geowissenschaften, Universität Leipzig

Ferromagnetic shape memory alloys are a captivating class of smart functional materials and very promising candidates for miniaturized actuation devices featuring reversible strains of several percent due to the reorientation of twin variants in the martensite phase caused by an applied external magnetic field. In this context the ferromagnetic shape memory alloy Fe₇Pd₃ is of particular interest because of its high ductility, low brittleness, and corrosion resistance enabling the use of this alloy in micromedicine.

Within an in situ study, we explore the mechanical properties of martensite and austenite freestanding Fe₇Pd₃ thin films, while monitoring changes in the surface relief as measured by scanning electron microscopy. This allows to establish correlations between structural changes and mechanical respose.