Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 748, Issue -, Pages 970-978Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2018.03.245
Keywords
Permalloy; Nanogranular thin films; Pulsed electrodeposition; Mechanisms of films growth
Categories
Funding
- Ministry of Education and Science of the Russian Federation [kappa4-2017-041, kappa3-2017-059, Pi02-2017-2-4, RFME-FI59417X0014, 5.5523.2017/8.9, 4.1346.2017/4.6]
- Act 211 Government of the Russian Federation [02.A03.21.0011]
- Russian Federation
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Thin Ni-Fe films were produced via electrodeposition onto silicon substrate using direct current and pulse (with different pulse durations) regimes. The correlation between technological regimes and chemical composition and microstructure for Ni-Fe nanogranular films was discussed. Analysis of the microstructure evolution revealed the changing mechanism of the films growth from the Volmer-Weber (describes island film growth) to the Stranski-Krastanov (layer by layer at the growth beginning) with the shortening of the pulse duration less than 10 mu s. This anomalous behavior was explained by an increase of the binding energy between the initial atoms and the substrate surface. The results showed that using electrodeposition regimes, which ensure growth with the average crystal size less than the critical value (10 nm), provides less roughness, defectiveness and greater film uniformity in thickness, and, therefore, stable properties. (C) 2018 Elsevier B.V. All rights reserved.
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