Frequency dependence of giant magnetoimpedance effect in CuBe/CoFeNi plated wire with different types of magnetic anisotropy

Abstract

Articles you may be interested inTunable asymmetric magnetoimpedance effect in ferromagnetic NiFe/Cu/Co films Appl. Phys. Lett. 105, 102409 (2014); 10.1063/1.4895708 Magnetoimpedance and magnetization processes of FeCoNi electroplated tubesVery large magnetoimpedance effect in FeCoNi ferromagnetic tubes with high order magnetic anisotropy Magnetoimpedance effect in CoFeNi plated wire with ac field annealing destabilized domain structure A giant magnetoimpedance effect ͑GMI͒ has been measured in a CuBe 0.1 mm diameter wire, electroplated with a Co 6 Fe 20 Ni 74 layer 1 m thick. Heat treatments after the electrodeposition were performed under the dc or ac field. The GMI has been measured in the frequency range 0.25 to 9 MHz, using ac driving current from 5 to 35 mA. The maximum GMI ratio depends strongly on the heat treatments, the intensity and the frequency of the driving current, reaching the value of 165% for optimal conditions. Results are discussed, taking into account the anisotropy distribution in the magnetic layer induced by the heat treatments under the field and a simple rotation model.

Giant magneto-impedance and its applications

“…In the case of GMI effect in coated tubes such as the electroplated FeNi, FeNiCo, and CoP microwires, Kurlyandskaya et al [12] found a huge enhancement factor approaching 800% in Fe 20 Co 6 Ni 74 layers (1 µ m-thick) electroplated onto CuBe nonmagnetic microwire (100 µm diameter) at a frequency of 1.5 MHz. That shows the way for producing the largest GMI in these systems.…”

Current distribution and giant magnetoimpedance in composite wires with helical magnetic anisotropy

“…Thus, at low frequencies, the magnetic field distribution in the wire can be found by means of Eqs. (14), (23) (10) and (11). After that, the diagonal and off-diagonal components of the wire impedance can be calculated as …”

Giant Magnetoimpedance in Ti/CoP Plated Wires

“…Most of previous published papers treated magnetoimpedance on plated wires with a constant magnetic thickness. [9][10][11][12] Up to now no detailed experimental data about the influence of magnetic layer thickness on the GMI effect were given yet, except one report on Cu/CoP wires with CoP thickness D of 3, 4 and 7 mm.…”

“…Besides of the uniform wires, ribbons and films, [3][4][5][6][7][8] this effect has been observed in inhomogeneous structured materials such as non -magnetic conducting wire plated with magnetic layers and some sandwich films. [9][10][11][12][13][14][15][16][17][18] Large GMI effect occurs at a relative low frequency in BeCu/NiFe, 9) BeCu/CoFeNi, 10) Ag/NiFe 11) and Cu/CoP 12,13) plated wires. Most of previous published papers treated magnetoimpedance on plated wires with a constant magnetic thickness.…”