Morphology, structure and magnetic properties of cobalt–nickel films obtained from acidic electrolytes containing glycine
This paper focuses on the development and optimization of electroplated cobalt–nickel (CoNi) alloys for use in biomedical microdevices. CoNi films were electrodeposited from glycine-containing electrolyte solutions at acidic pH. The influence of pH (2.5–5), temperature (55 and 80 °C), current densit...
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Published in | Electrochimica acta Vol. 56; no. 3; pp. 1399 - 1408 |
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Main Authors | , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Kidlington
Elsevier Ltd
2011
Elsevier |
Subjects | |
Online Access | Get full text |
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Summary: | This paper focuses on the development and optimization of electroplated cobalt–nickel (CoNi) alloys for use in biomedical microdevices. CoNi films were electrodeposited from glycine-containing electrolyte solutions at acidic pH. The influence of pH (2.5–5), temperature (55 and 80
°C), current density (from −5 to −40
mA
cm
−2), glycine concentration (0.5 and 1
mol
dm
−3) and the nature of the metal salts (chlorides or sulphates) on the composition and the magnetic properties of the films were systematically analyzed. The cobalt content varied between 50 and 83
wt% depending on the applied conditions. As a result, deposits showed variable morphologies, different structures (either hexagonal close-packed (hcp) or mixed hcp and face-centered cubic phases) and tunable magnetic properties, ranging from semi-hard (18.51
kA
m
−1, i.e. 233
Oe) to very soft (1.43
kA
m
−1, i.e. 18
Oe). To understand the role of glycine in this system, a comparison of the electrochemical processes, and the structural and magnetic properties is made for samples produced in glycine-containing and glycine-free baths. |
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Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 0013-4686 1873-3859 1873-3859 |
DOI: | 10.1016/j.electacta.2010.10.068 |