Reference : Substrate Induced Strain Field in FeRh Epilayers Grown on Single Crystal MgO (001) Su...
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Substrate Induced Strain Field in FeRh Epilayers Grown on Single Crystal MgO (001) Substrates
Barton, C. W. [> >]
Ostler, Thomas mailto [Université de Liège > Département de physique > Physique des matériaux et nanostructures >]
Huskisson, D. [> >]
Kinane, C. J. [> >]
Haigh, S. J. [> >]
Hrkac, G. [> >]
Thomson, T. [> >]
Scientific Reports
Nature Publishing Group
Yes (verified by ORBi)
United Kingdom
[en] Equi-atomic FeRh is highly unusual in that it undergoes a rst order meta-magnetic phase transition from an antiferromagnet to a ferromagnet above room temperature (Tr ≈ 370 K). This behavior opens new possibilities for creating multifunctional magnetic and spintronic devices which can utilise both thermal and applied eld energy to change state and functionalise composites. A key requirement in realising multifunctional devices is the need to understand and control the properties of FeRh in the extreme thin lm limit (tFeRh < 10 nm) where interfaces are crucial. Here we determine the properties of FeRh lms in the thickness range 2.5–10 nm grown directly on MgO substrates. Our magnetometry and structural measurements show that a perpendicular strain eld exists in these thin films which results in an increase in the phase transition temperature as thickness is reduced. Modelling using a spin dynamics approach supports the experimental observations demonstrating the critical role of the atomic layers close to the MgO interface.
EPSRC;Defense threat Reduction Agency;Marie Curie incoming BeIPD-COFUND fellowship program at the University of Liège
Researchers ; Professionals

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