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Tuning the magnetic properties of amorphous Fe-Gd thin films by variation of thickness and composition

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Abstract

Fe-Gd amorphous thin films of different compositions and thicknesses were analyzed with respect to their magnetic and magneto-optical behavior. By preparing samples with the same Fe/Gd elemental ratio at different thicknesses, and of various Fe/Gd ratios at constant thickness, respectively, we were able to show the influences of these two parameters on the interconnected behavior of the two magnetic sub-lattices, one of Fe and the other of Gd, which are antiferromagnetically coupled. Magneto-Optical Kerr Effect (MOKE) measurements revealed reversed hysteresis loops for sample compositions crossing the magnetic compensation point. Temperature dependent magnetization curves highlighted the variation of the overall net contribution of the two magnetic sub-lattices by changing either the Fe/Gd elemental ratio or the film thickness. 57Fe Conversion Electron Mössbauer (CEM) spectra give additional support to the specific magnetic behavior evidenced by temperature and field dependent Superconducting Quantum Interference Device (SQUID) magnetometry.

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Acknowledgements

The authors would like to acknowledge the financial support from the Romanian Ministry of Research and Innovation through projects RAISESEE Contract no.17167/2018, PD 163/2020, and Core Program PN030101 (21N/2019).

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Authors and Affiliations

  1. National Institute of Materials Physics, Atomistilor 405A, Magurele, 077125, Romania

    Claudiu Locovei, Nicusor Iacob, Gabriel Schinteie, Anda Elena Stanciu, Aurel Leca & Victor Kuncser

  2. Faculty of Physics, University of Bucharest, Atomistilor 405, Magurele, 077125, Romania

    Claudiu Locovei

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  1. Claudiu Locovei
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  2. Nicusor Iacob
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Correspondence to Victor Kuncser.

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This article is part of the Topical Collection on Proceedings of the International Conference on the Applications of the Mössbauer Effect (ICAME 2021), 5-10 September 2021, Brasov, Romania

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Locovei, C., Iacob, N., Schinteie, G. et al. Tuning the magnetic properties of amorphous Fe-Gd thin films by variation of thickness and composition. Hyperfine Interact 242, 44 (2021). https://doi.org/10.1007/s10751-021-01763-1

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