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

Abstract In this work, we study the granular samples of mixed Cu 50 (Fe 69 Si 10 B 16 C 5 ) 50 composition where half of alloy composition is commonly used amorphous soft magnetic material and the other half-Cu. Glass covered Cu 50 (Fe 69 Si 10 B 16 C 5 ) 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 K α radiation. The as-prepared Cu 50 (Fe 69 Si 10 B 16 C 5 ) 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.