Electric Field Control of Magnetoresistance in Epitaxial Fe_0.75Co_0.25 in Composite Multiferroics

Composite multiferroics that integrate ferroelectric and magnetic properties can function above room temperature and exhibit improved magnetoelectric (ME) coupling compared to single-phase multiferroic materials, making them desirable candidates for both studying the fundamental physics of ME coupling and applications for future novel devices.¹ Further, these composite multiferroics present an opportunity to alter magnon generation and propagation via electrical methods. In this study, we investigate the magnetization dynamics of MBE-grown Fe_0.75Co_0.25, a metallic ferromagnet with low damping and high magnetoelastic constant, epitaxially grown on ferroelectric materials.^2–4 Electric field manipulation of magnetoresistance is observed and further characterized using transport and optical techniques.

References

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4. Schwienbacher, D. et al. Magnetoelasticity of Co25Fe75 thin films. J Appl Phys 126, https://doi.org/10.1063/1.5116314 (2019).