Pd-Fe alloy film with high magnetic gradient: structural and magnetic properties
I.V. Yanilkin1,2, A.I. Gumarov1,2, I.A. Golovchanskiy3,4, G.F. Gizzatullina1, A.G. Kiiamov1, B.F. Gabbasov1, R.V. Yusupov1, L.R. Tagirov1,2
1Kazan Federal University, Kazan, Tatarstan, Russia
2Zavoisky Physical-Technical Institute, FRC “Kazan Scientific Center of RAS”, Kazan, Russia
3National University of Science and Technology MISiS, Moscow, Russia
4Center for Photonics and 2D Materials, Moscow Institute of Physics and Technology, Dolgoprudnyi, Russia
Email: yanilkin-igor@yandex.ru

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An epitaxial film of the Pd-Fe alloy 116 nm thick with an iron concentration varying in depth from 2 at.% to 50 at.% has been synthesized. An experimental depth distribution profile of iron was obtained as a result of stepwise etching of the film surface with Ar+ ions. Profiling has shown that, as a result of annealing, the impurity was redistributed in the film, and a layer of the L10-phase with a constant concentration was formed near the film surface. After removal of the L10-phase, the film exhibits "easy-plane" anisotropy. The study of spin-wave resonance spectra showed the presence of several modes of standing spin waves, the number of which depends on the residual film thickness. Keywords: graded magnetic materials, molecular beam epitaxy, palladium-iron alloys, X-ray diffraction, spin-wave resonance.
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