Abstract—The effect of laser pulse energy E on the possibility of forming of a homogeneous “high-temperature” ferromagnetic phase in MnxSi1 – x (x ≈ 0.5) alloy films grown by pulsed laser deposition onto an Al2O3 (0001) substrate has been studied. The high-temperature phase with manganese concentration x ≈ 0.53 and the Curie temperature TC ~ 200–300 K is shown to form near the substrate at the initial stage of the film growth. In this case, high values E ≥ 6.8 J/cm2 favor the stabilization of this phase over all film thickness, while low values E = 2.6–5.7 J/cm2 lead to a decrease in the manganese concentration in the upper film layer and the formation of additional “low–temperature” phase with TC ≈ 30–50 K provided by silicides MnSi and Mn4Si7 crystallites.
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ACKNOWLEDGMENTS
This work was supported by the Federal Agency of Scientific Organization (Agreement no. 007-GZ/Ch3363/26) as for “synthesis of thin MnxSi1 – x” and the Russian Foundation for Basic Research (projects nos. 18-07-00772, 18-07-00756, 17-07-00615, 16‑07-00657, and 16-07-00798) as for “the study of the electrophysical and magnetic properties of prepared nanodimensioned films.”
This work was supported in part by the Program of the Presidium of the RAS 1.4 “Actual problems of low-temperature physics.”
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Drovosekov, A.B., Savitsky, A.O., Kreines, N.M. et al. Effect of Laser Fluence on Magnetic Properties of Thin MnxSi1 – x (x ≈ 0.5) Films Prepared by Pulsed Laser Deposition. Phys. Solid State 60, 2188–2193 (2018). https://doi.org/10.1134/S1063783418110045
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DOI: https://doi.org/10.1134/S1063783418110045