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

1. Pradhan, D. K., Kumari, S. & Rack, P. D. Magnetoelectric Composites: Applications, Coupling Mechanisms, and Future Directions. Nanomaterials (Basel) 10, 2072 (2020).

2. Edwards, E. R. J., Nembach, H. T. & Shaw, J. M. Co₂₅Fe₇₅ Thin Films with Ultralow Total Damping of Ferromagnetic Resonance. Phys. Rev. Appl. 11, 054036 (2019).

3. Lee, A. J. et al. Metallic ferromagnetic films with magnetic damping under 1.4 × 10−3. Nat Commun 8, 234 (2017).

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