期刊
JOURNAL OF APPLIED ELECTROCHEMISTRY
卷 39, 期 2, 页码 233-240出版社
SPRINGER
DOI: 10.1007/s10800-008-9661-9
关键词
Cobalt coatings; Electrodeposition; Magnetic properties; Crystal structure
资金
- Comision Interministerial de Ciencia y Tecnologia (CICYT) [MAT-2006-12913-C02-01]
- Departament d'Innovacio
- Universitats i Empresa of the Generalitat de Catalunya
- Fons Social Europeu
Cobalt electrodeposits were prepared from an electrolytic bath containing cobalt perchlorate. The effect of different species, organic (thiourea and sodium gluconate) and inorganic (boric acid), on the crystallographic structure, morphology, magnetic properties and electrochemical behaviour of cobalt electrodeposits was investigated. Amorphous cobalt, hcp cobalt and a non-usual primitive cubic cobalt phase were observed depending on the bath composition. Depending on the structure, different morphologies and magnetic properties were found. Coercivity values of the cobalt coatings ranged from around 15 Oe for amorphous, nodular deposits to 380 Oe for cobalt coatings showing acicular morphology and hcp structure with a (002) preferred orientation. Knowledge of the influence of the species on the properties of cobalt makes it possible to obtain tailored cobalt films.
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