Fabrication and magnetic properties of Cu50(Fe69Si10B16C5)50 thin microwires

In this work, we study the granular samples of mixed Cu50(Fe69Si10B16C5)50 composition where half of alloy composition is commonly used amorphous soft magnetic material and the other half-Cu. Glass covered Cu50(Fe69Si10B16C5)50 microwires were produced and their magnetic properties were studied. The evolution of the structure after the annealing was observed using X-ray diffraction with Cu Kα radiation. The as-prepared Cu50(Fe69Si10B16C5)50 microwires present a relatively low coercivity of about 5 Oe and exhibit non-regular hysteresis loop typical behavior for two-phases systems. Annealing resulted in magnetic hardening of the samples with coercivity of about 50 Oe. The variation of the coercivity and remanent magnetization with the temperature at 5–300 K were obtained from those curves. Temperature dependence of magnetization at 5–300 K exhibits significant difference between field-cooled and zero-field cooled behaviour. Observed dependences interpreted in terms of two-phase structure of as-prepared samples and evolution of the structure under annealing.