Effect of magnetic field on the magnetic properties of electroplated NiFe/Cu composite wires

Abstract

The effect of the magnetic field on the magnetic properties of NiFe/Cu composite wires electroplated under a longitudinal magnetic controlling field is presented. Composite wire samples of 20-μm-diameter Cu electroplated with a layer of Permalloy™ (Ni80Fe20) under the influence of a longitudinal magnetic field of intensities ranging from 0 to 400 Oe were produced, and the microstructure and magnetic properties were measured. The results showed that the longitudinal magnetic field in the composite wire plating makes the packing of the crystals in the plated layer more orderly, and thus increases the uniformity and magnetic softness of the plated material. It also shifts the magnetic anisotropy of the plated layer from circumferential to longitudinal, and increases the critical frequency of the plated composite wire in magnetoimpedance effect testing, at which the magnetoimpedance ratio reaches the maximum.

Electrodeposition of Ni–Fe micro-pillars using laser drilled templates

“…Previous studies have shown that the permeability of the sensing element can be enhanced by the optimization of the process parameters [6,7]. On the other hand, a recent research shows that a multi-core sensing element increases the sensitivity exponentially as a function of the number of ferromagnetic cores [8]. Thus, in this case, an array of micron-sized ferromagnetic pillars could be greatly beneficial to the performance of the sensing element in the sensor.…”

Magnetic Microwires With Field-Induced Helical Anisotropy for Coil-Less Fluxgate

“…It has been reported that a moderate magnetic field during electroplating can modify the magnetic properties of NiFe/Cu composite wires [3] and also for other alloys/geometries [4], [5].…”

Giant magnetoimpedance effect of ac‐dc Joule annealed electroplated NiFe/Cu composite wires

“…In addition, pH value can affect the composition of deposited layer and the sac- charin in electrolyte can reduce the grain size [8]. Applying longitudinal magnetic field during deposition can also improve magnetic properties [9]. Therefore, in producing ideal microtubes, a lot of parameters should be controlled during deposition process.…”