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2018•Scripta MaterialiaOpen access

Giant magnetic-field-induced strain in Ni-Mn-Ga micropillars

Denys Musiienko, Ladislav Straka, Ladislav Klimša, Andrey Saren, A. Sozinov, Oleg Heczko, K. Ullakko

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Abstract

We report on the observation of fully reversible magnetic-field-induced strain of 6% in a single-crystalline micropillar fabricated from a bulk Ni50Mn28.5Ga21.5 single crystal. Xe plasma source focused ion beam column milling technology was used to machine 50 × 50 × 100 μm3 cuboid pillars. The removal of about 2 μm of ion-beam-damaged surface layer enabled magnetic field actuation in pillars. Our results demonstrate the feasibility of manufacturing of micrometre-sized magnetic shape memory actuators by focused ion beam technique.

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We report on the observation of fully reversible magnetic-field-induced strain of 6% in a single-crystalline micropillar fabricated from a bulk Ni50Mn28.5Ga21.5 single crystal. Xe plasma source focused ion beam column milling technology was used to machine 50 × 50 × 100 μm3 cuboid pillars. The removal of about 2 μm of ion-beam-damaged surface layer enabled magnetic field actuation in pillars. Our results demonstrate the feasibility of manufacturing of micrometre-sized magnetic shape memory actuators by focused ion beam technique.

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Available abstract

We report on the observation of fully reversible magnetic-field-induced strain of 6% in a single-crystalline micropillar fabricated from a bulk Ni50Mn28.5Ga21.5 single crystal. Xe plasma source focused ion beam column milling technology was used to machine 50 × 50 × 100 μm3 cuboid pillars. The removal of about 2 μm of ion-beam-damaged surface layer enabled magnetic field actuation in pillars. Our results demonstrate the feasibility of manufacturing of micrometre-sized magnetic shape memory actuators by focused ion beam technique.

Key concepts: Materials science, Focused ion beam, Ion beam, Magnetic field, Beam (structure), Cuboid, Plasma, Actuator

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