Communication

Stray-Field-Induced Actuation of Free-Standing Magnetic Shape-Memory Films

  1. Michael Thomas1,
  2. Oleg Heczko1,3,
  3. Jörg Buschbeck1,
  4. Yiu Wai Lai1,
  5. Jeffrey McCord1,
  6. Stefan Kaufmann1,2,
  7. Ludwig Schultz1,2,
  8. Sebastian Fähler1,2,*

Article first published online: 2 JUN 2009

DOI: 10.1002/adma.200900469

Issue

Advanced Materials

Advanced Materials

Volume 21, Issue 36, pages 3708–3711, September 25, 2009

Additional Information

How to Cite

Thomas, M., Heczko, O., Buschbeck, J., Lai, Y. W., McCord, J., Kaufmann, S., Schultz, L. and Fähler, S. (2009), Stray-Field-Induced Actuation of Free-Standing Magnetic Shape-Memory Films. Adv. Mater., 21: 3708–3711. doi: 10.1002/adma.200900469

Author Information

  1. 1

    IFW Dresden P.O. Box 270116, 01171 Dresden (Germany)

  2. 2

    Institute for Solid State Physics Department of Physics Dresden University of Technology 01062 Dresden (Germany)

  3. 3

    Institute of Physics Academy of Sciences of Czech Republic Na Slovance 8, Prague (Czech Republic)

*IFW Dresden P.O. Box 270116, 01171 Dresden (Germany).

Publication History

  1. Issue published online: 22 SEP 2009
  2. Article first published online: 2 JUN 2009
  3. Manuscript Revised: 20 MAR 2009
  4. Manuscript Received: 10 FEB 2009

Funded by

  • Deutsche Forschungsgemeinschaft (DFG). Grant Number: SPP1239

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Keywords:

  • actuators;
  • ferromagnetic materials;
  • magnetic shape-memory alloys;
  • martensitic transformation;
  • phase transitions
Thumbnail image of graphical abstract

Free-standing epitaxial NiMnGa films are used to demonstrate a novel thermal actuation mode. To avoid the high magnetostatic stray-field energy, the easy axis of the martensitic variants is aligned preferentially in-plane. This results in a maximum strain of up to 1.1% without the need for training or an external magnetic field.

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