Effect of pH on the magnetoimpedance properties of electrodeposited CoNiFe microtubes

• Published in: Physica. B, Condensed matter Condensed matter, 2006-01, Vol.371 (2), p.327-331
• Main Authors: Atalay, F.E., Kaya, H., Atalay, S.
• Format: Article
• Language: English
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Electrodeposition; Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures; Electronic transport phenomena in thin films and low-dimensional structures; Exact sciences and technology; Galvanomagnetic and other magnetotransport effects (including thermomagnetic effects); Magnetic properties and materials; Magnetic properties of monolayers and thin films; Magnetic properties of surface, thin films and multilayers; Magnetoimpedance; Physics; Soft magnetic films
• ISSN: 0921-4526; 1873-2135
• DOI: 10.1016/j.physb.2005.10.126

Cobalt/nickel/iron (CoNiFe) magnetic samples were prepared by electrodeposition onto copper wires with a diameter of 50 μm. The magnetic properties of CoNiFe microtubes were systematically investigated at pH 2–3.5. It was observed that the composition, surface quality and magnetic and magnetoimpedance (MI) properties of the CoNiFe magnetic tubes were strongly affected by the pH of the electrochemical bath. The MI ratio of 123.2% at 160 kHz and a coercivity of 51.5 A/m were obtained for the sample that was produced in the pH 2.4 solution. The energy dispersive X-ray spectrum was also evaluated; this film had a composition of 22.14% Co, 59.94% Ni and 17.92% Fe, with no impurities.