Crystallization, Transport and Magnetic Properties of the Amorphous (Fe_1–xMn_x)₇₅P₁₅C₁₀ Alloys

Md. Kamruzzaman, Md. Abu Sayem Karal, Dilip Kumar Saha, Feroz Alam Khan

Bangladesh University of Engineering and Technology (BUET), Dhaka-1000, Bangladesh.
Department of Physics, Begum Rokeya University, Rangpur, Rangpur-5400, Bangladesh.
Materials Science Division, Atomic Energy Center, Dhaka-1000, Bangladesh.

DOI: 10.4236/jcpt.2012.23013                

Abstract

The amorphous (Fe_1-xMn_x)₇₅P₁₅C₁₀ (0 ≤ x ≥ 0.30) alloys were prepared by the standard melt spinning technique and investigated their crystallization, thermal, transport and magnetic properties. Crystallization was observed from 400℃ to 650℃ with an interval 50℃within 30 minutes annealing time by XRD. The as-cast samples were amorphous in nature. Annealing 400℃ to 450℃ samples showed the mixed bcc Fe and amorphous structures. The lattice parameter ‘a’ was varied from 2.855 to 2.859 ? but above 450℃, samples contained hexagonal, FeP and FeC structures. The lattice parameters ‘a’ and ‘c’ were varied from (5.016-5.036) ? and (13.575-13.820) ? , respectively. Average crystallite size was found to vary from 8 to 48 nm. Crystallization temperature and weight change were observed by differential thermal analysis and thermogravimetric analysis, respectively. Crystallization temperature was increased with increasing Mn content. Resistivity was increased above and bellows the Curie temperature. Real permeability remained almost constant upto around 10⁶ Hz for of all samples after that it was decreased with increasing frequency and it was also decreased with Mn, whereas imaginary permeability was increased sharply above frequency 10⁷ Hz. The value of saturation magnetization was found to decrease with increment Mn.

Keywords

Metallic Glass; Melt Spinning Technique; Crystallization; DTA; VSM

Conflicts of Interest

The authors declare no conflicts of interest.

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