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PUBLICATIONS

Influence of Potential and the Presence of Boric Acid on Pt1-xCox Alloy Electrodeposition and Magnetic Properties

Published

Author(s)

Eric Rus, Eduardo De Lima Correa, Cindi L. Dennis, Thomas P. Moffat

Abstract

The effects of potential and the presence of B(OH)3 on the electrodeposition of Pt1-xCox alloys from aqueous chloride-based solutions have been investigated, and the properties of the resulting films characterized. Films deposited at potentials <-0.65 V vs SCE had >90 atomic % Co and were hexagonal close packed. Those deposited at >-0.65 V showed a monotonic decrease in cobalt content with increasing potential and were face centered cubic. The structural change coincided with a distinct cusp in the composition potential relationship, and with a prominent voltametric feature, possibly relating to nucleation of the hcp phase. The presence of B(OH)3 produced a sharp minimum in both Coulombic efficiency and deposition rate at potentials near -0.65 V and almost entirely suppressed the voltametric feature. The presence of B(OH)3 did not strongly affect the magnetic behavior of films deposited at >-0.55 V (i.e., those with compositions less than about 40% cobalt), but resulted in generally lower maximum magnetizations for films deposited at more reducing potentials, and a much lower magnetization for films deposited at -0.65 V. Pt1-xCox films (x=0.2) deposited at -0.35 V had Curie temperatures (TC) in the room temperature range.
Citation
Journal of the Electrochemical Society
Volume
171
Pub Type
Journals

Download Paper

https://doi.org/10.1149/1945-7111/ad6b48
Local Download

Keywords

platinum cobalt, induced co-deposition, magnetic thermosensitivity, Curie temperature
Metals, Materials characterization and Chemistry

Citation

Rus, E. , De Lima Correa, E. , Dennis, C. and Moffat, T. (2024), Influence of Potential and the Presence of Boric Acid on Pt1-xCox Alloy Electrodeposition and Magnetic Properties, Journal of the Electrochemical Society, [online], https://doi.org/10.1149/1945-7111/ad6b48, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=957292 (Accessed October 11, 2025)

Issues

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Created August 26, 2024, Updated September 9, 2024
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