GMI Effect Sensing on Magnetic Microwires

GMI Effect of Ultra-Soft Magnetic Soft Amorphous Microwires

In this paper we experimentally studied GMI effect and soft magnetic behavior of Co-rich microwires. Correlation between magnetoelastic anisotropy and magnetic field dependences of diagonal and off-diagonal impedance components are observed. Low field GMI hysteresis, explained in terms of magnetoelastic anisotropy of microwires, has been suppressed by the bias current.

Tuneable Composites Containing Magnetic Microwires

High Frequency Amplitude Detector for GMI Magnetic Sensors

A new concept of a high-frequency amplitude detector and demodulator for Giant-Magneto-Impedance (GMI) sensors is presented. This concept combines a half wave rectifier, with outstanding capabilities and high speed, and a feedback approach that ensures the amplitude detection with easily adjustable gain. The developed detector is capable of measuring high-frequency and very low amplitude signal...

Relating surface roughness and magnetic domain structure to giant magneto-impedance of Co-rich melt-extracted microwires

Understanding the relationship between the surface conditions and giant magneto-impedance (GMI) in Co-rich melt-extracted microwires is key to optimizing their magnetic responses for magnetic sensor applications. The surface magnetic domain structure (SMDS) parameters of ~45 μm diameter Co69.25Fe4.25Si13B13.5-xZrx (x = 0, 1, 2, 3) microwires, including the magnetic domain period (d) and surface...

Microwave Tunable Composites with Melt- Extracted Magnetic Microwires

1 General Introduction A key to the realization of effective microwave tunable devices, among others, is to develop adaptive materials with superior adjustability of electromagnetic parameters. Since there are two fundamental electromagnetic parameters, namely, permittivity and permeability, the tunable property can then be readily approached by manipulating (i) permittivity directly via the el...