In this work, molecular beam epitaxy is utilized to stabilize a nanostructured thin-film magnet of soft magnetic Y2Co17 exchange coupled to hard magnetic YCo5, with enhanced energy density. The nanoscale architecture of the film comprises of a network of coherently interlinked and aligned Y2Co17 and YCo5 building blocks leading to a favorable exchange-coupling and the desired perpendicular anisotropy. The work highlights the importance of thin-film epitaxy in understanding magnetic hardening mechanisms and suggests strategies for a rational design of future sustainable magnetic systems.
S. Sharma, D. Ohmer, A. Zintler, M. Major, I. Radulov, U. Kunz, P. Komissinskiy, B. Xu, H. Zhang, L. Molina-Luna, K. P. Skokov, and L. Alff
Induction of uniaxial anisotropy by controlled phase separation in Y-Co thin films
Phys. Rev. B, 102, 014435 (2020)