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Controlling reversibility of the magneto-structural transition in first-order materials on the micro scale.

Number: 1623

Author(s) : NIEMANN R., DIESTEL A., BACKEN A., et al.

Summary

Materials with structural first-order transformations that coincide with a drastic change in magnetization are interesting for magnetocaloric applications. The theoretical cooling capacity of these materials is high, but during a cyclic application, the ongoing formation and moving of phase boundaries dissipates valuable energy. We propose a route to decrease the hysteresis by shifting the transformation temperature locally and preserving nuclei of the low-temperature phase. As a model system we use epitaxial Ni-Mn-Ga films. Thin films may also find a field of application in micro-systems.

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Pages: 2 p.

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Details

  • Original title: Controlling reversibility of the magneto-structural transition in first-order materials on the micro scale.
  • Record ID : 30013131
  • Languages: English
  • Source: 6th International Conference on Magnetic Refrigeration at Room Temperature (Thermag VI). Proceedings: Victoria, Canada, September 7-10, 2014.
  • Publication date: 2014/09/07

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