Abstract
Palladium–iron alloys produced by high-dose implantation of iron ions into epitaxial palladium films were investigated with the ferromagnetic resonance (FMR) and vibrating sample magnetometry (VSM) techniques. The samples reveal distinct multiple FMR responses depending on the dose of iron ion implantation. The post-implantation annealing at 770 K does not bring the implanted films to a homogeneous solid solution state, as might be expected from the Pd–Fe phase diagram. On the contrary, the system approaches a stable state composed of several magnetic phases. FMR spectra exhibit an angular behavior specific for a stack of interacting magnetic layers. This observation, correlated with the magnetometry data, indicates that the palladium–iron binary alloy has a previously unknown tendency towards spinodal decomposition into isostructural phases with well-defined iron concentrations and, accordingly, with different temperatures of ferromagnetic ordering and saturation magnetizations.
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The data that support the findings of this study are available from the corresponding author upon a reasonable request.
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Acknowledgements
The authors are grateful to Golovchanskiy Igor (MISIS, Moscow) for a fruitful discussion of the results. Synthesis and analysis of the films were carried out at the PCR Federal Center of Shared Facilities of KFU with the running costs covered by the Program of Competitive Growth of Kazan Federal University.
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This work was supported by the RFBR Grant No. 20-02-00981.
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Gumarov, A.I., Yanilkin, I.V., Rodionov, A.A. et al. Manifestations of Spinodal Decomposition into Dilute Pd1-xFex “Phases” in Iron-Implanted Palladium Films: FMR Study. Appl Magn Reson 53, 875–886 (2022). https://doi.org/10.1007/s00723-022-01464-0
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DOI: https://doi.org/10.1007/s00723-022-01464-0