Author(s)

Md. Khalid Hossain^1*, Jannatul Ferdous², Md. Manjurul Haque², A. K. M. Abdul Hakim³

¹Institute of Electronics, Atomic Energy Research Establishment, Savar, Dhaka, Bangladesh.
²Department of Applied Physics, Electronics & Communication Engineering, Islamic University, Kushtia, Bangladesh.
³Department of Glass and Ceramic Engineering, Bangladesh University of Engineering and Technology, Dhaka, Bangladesh.

Nanocrystalline Fe-based alloys offer a new opportunity for tailoring soft magnetic materials. Nanocrystalline alloy in the form of ribbon with the composition of Fe_73.5Cu₁Nb₃Si1_3.5B₉ was prepared by rapid quenching method for soft magnetic properties analysis. The rapidly quenched alloy has been annealed in a controlled way in the temperature range 490℃ to 680℃ and annealing time 1 min to 60 min. The study of the structural parameters has been investigated by means of XRD analysis. Magnetic properties were analyzed by measuring B-H loop and frequency dependence of initial permeability. Enhanced value of initial permeability by two orders of magnitude and very low value of relative loss factor of the order of 10^–3 has been observed with the variation of annealing temperature and time. The initial permeability for the optimum annealed sample has been found 23,064 as compared with 360 for its amorphous counterpart. The initial permeability spectra show dispersion around 100 kHz. Magnetic hysteresis has been investigated by measuring B-H loops at various magnetic fields for different annealing temperature and time. The coercivity and remanence has been found to decrease significantly for optimized annealed condition compared to as-cast state. The core loss of the samples decreases with the annealing time which indicates the good magnetic property of soft magnetic materials.

Nanocrystalline Alloy, Magnetic Property, Hysteresis Loop, Permeability, Coercivity, Remanence

Hossain, M. , Ferdous, J. , Haque, M. and Hakim, A. (2015) Study and Characterization of Soft Magnetic Properties of Fe_73.5Cu₁Nb3Si_13.5B₉ Magnetic Ribbon Prepared by Rapid Quenching Method. Materials Sciences and Applications, 6, 1089-1099. doi: 10.4236/msa.2015.612108.