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Actuating A Magnetic Shape Memory Element Locally With A Set Of Coils, Andrew Armstrong, Peter Müllner
Actuating A Magnetic Shape Memory Element Locally With A Set Of Coils, Andrew Armstrong, Peter Müllner
Materials Science and Engineering Faculty Publications and Presentations
The local actuation of a magnetic shape memory (MSM) element as used in an MSM micropump is considered. This paper presents the difference between an electromagnetic driver and a driver that uses a rotating permanent magnet. For the magnetic field energy of the permanent magnetic drive, the element takes in a significant stray field. In a particular case, energy reduction was 12.7 mJ. For an electromagnetic drive with an identical size of the MSM element, the total magnetic field energy created by the system was 2.28 mJ. Attempts to experimentally nucleate twins in an MSM element by energizing an electromagnetic …