JOURNAL OF PHYSICS D-APPLIED PHYSICS, cilt.39, sa.3, ss.431-436, 2006 (SCI-Expanded)
Magnetoimpedance (MI) and hysteresis loops were studied in electroplated Ni-79.1 Fe-20.9/Cu, Ni75.64Fe24.26Ru0.10/Cu, Ni79.51Fe20.31Ru0.18/Cu and Ni75.99Fe23.66Ru0.34/Cu wires. Scanning electron micrographs showed that crack-free electroplated wires were obtained with a smooth surface. The average grain size varied between 3 and 10 mu m for all samples. It was found that circumferential anisotropy was induced in all samples during the electroplating process. The maximum MI response was 459 % at a frequency of 90 kHz, 361 % at 110 kHz, 157 % at 100 kHz and 114 % at 340 kHz for Ni79.1Fe20.9/Cu, Ni75.64Fe24.26Ru0.10/Cu, Ni79.51Fe20.31Ru0.18/Cu and Ni75.99Fe23.66Ru0.34/Cu wires, respectively.