4.6 Article

Fe-Mn-Ga shape memory glass-coated microwire with sensing possibilities

Journal

JOURNAL OF PHYSICS D-APPLIED PHYSICS
Volume 55, Issue 4, Pages -

Publisher

IOP Publishing Ltd
DOI: 10.1088/1361-6463/ac2f6b

Keywords

Heusler alloys; shape memory effect; sensors; actuators

Funding

  1. Slovak Grant Agency [APVV-16-0079, VEGA 1/0053/19, VEGA 1/0404/21, VEGA 1/0705/20]

Ask authors/readers for more resources

The experimental observation of the structural phase transformation in a non-stoichiometric shape memory Fe42.8Mn27.6Ga29.6 Heusler glass-coated microwire was found to be in good agreement with magnetic, permeability, and electrical resistance measurements, providing evidence for the shape memory effect. The glass-coated microwire can not only shift the transformation temperature with an external magnetic field, but also determine whether the alloy has undergone structural transformation based on its initial permeability value.
The structural phase transformation in a non-stoichiometric shape memory Fe42.8Mn27.6Ga29.6 Heusler glass-coated microwire was experimentally observed using indirect magnetic, permeability, and electrical resistance measurements. While the temperature dependence of magnetization revealed hysteresis of magnetization during the heating and cooling process, magnetic hysteresis loops point to the change in the direction of the easy magnetization axis of the low- and high-temperature phase. Additionally, the unusual behavior of the permeability and electrical resistance measurements are in good agreement with the magnetic measurements. The x-ray diffraction profile measured at room temperature revealed the coexistence of a high-temperature L2(1) phase (a= 5.88 angstrom) and low-temperature phase with the L1(2) structure (a = 3.71 angstrom) and can be considered as another proof of the shape memory effect that is expected in the Fe-Mn-Ga-based Heusler alloys. In the presented glass-coated microwire, it is not only possible to shift the transformation temperature with the external magnetic field, but from its initial permeability value, it is possible to determine whether the alloy has undergone the structural transformation. Therefore, the presented Fe-Mn-Ga-based glass-coated microwire may be considered a suitable candidate for microactuators with sensory capabilities.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.6
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available