Artificial multiferroic structures using soft magnetostrictive bilayers on Pb(Mg 1/3 Nb 2/3 )-PbTiO 3
2018
Artificial multiferroic structures are of great interest as they combine two or more functionalities
together. One example of these structures are magnetostrictive films grown on top of piezoelectric
substrates; allowing the magnetisation hysteresis loop of the magnetostrictive film to be manipulated using
an electric field across the structure rather than a magnetic field. In this paper, we have studied the
multiferroic structure NiFe/FeCo/Ti/Pb(Mg1/3Nb2/3)-PbTiO3 (PMN-PT) as a function of the electric and
magnetic field. Soft magnetostrictive bilayer films (NiFe/FeCo) are studied, as often applications require
soft magnetic properties (small coercive and anisotropy fields) combined with larger magnetostrictive
constants. Unfortunately, FeCo films can have coercive fields that are too large, while NiFe films’
magnetostriction constants are almost zero; thus, combining the two together should produce the “ideal”
soft magnetostrictive film. It was found that the addition of a thin NiFe film onto the FeCo film reduced
the coercive field and remnant magnetisation on the application of an applied voltage in comparison to just
the FeCo film. It was also determined that for the NiFe/FeCo bilayer the magnetisation switchability was
~100% on the application of 8kV/cm, which was higher than the monolayer FeCo films at the same applied
field, demonstrating improvement of the multiferroic behaviour by the soft magnetic/magnetostrictive
bilayer.
Keywords:
- Correction
- Source
- Cite
- Save
- Machine Reading By IdeaReader
20
References
2
Citations
NaN
KQI