A Detailed Experimental Study on Amorphous Fe80-XGdXB20(0<X≤6) Alloys

B. Bhanu Prasad *
Department of Sciences & Humanities, M.V.S.R. Engineering College, Nadergul, Hyderabad, India.
Periodicity:October - December'2019

Abstract

An experimental study has been done on amorphous Fe78Gd2B20 (S1), Fe76Gd4B20 (S2), and Fe74Gd6B20 (S3) alloys to understand their electrical, phase transformation, and magnetic properties. Four Probe Technique (FPT), Differential Scanning Calorimetry (DSC), X-Ray Diffraction (XRD), and Vibration Sample Magnetometer (VSM) were used to characterize the samples. Resistance versus temperature curve of the fresh sample Fe78Gd2B20 (S1) showed a sudden drop around 800 K, indicating the amorphous for crystalline transformation of the sample. The resistivity of samples S1, S2, and S3 at room temperature was found to be 273.3 µΩ-cm, 242.1 µΩ-cm and 147 µΩ-cm, respectively. Temperature Coefficient of Resistance (TCR) of the samples S1, S2 and S3 was found to be 1.38 x 10-4 K-1,1.40 x 10-4 K-1 and 2.60 x10-4 K-1, respectively. The phase transformation and structural studies have been done using Differential Scanning Calorimetry (DSC) in the temperature range of 30 0C – 1000 0C. The DSC curve of sample S1 showed an exothermic sharp peak around 555 0C (828 K), indicating the amorphous to crystalline transformation. Thus, sample S1 showed single step crystallization. Samples S2, and S3 showed multi step (growth of different phases) crystallization. XRD studies showed the presence of α-Fe phase in the crystallized S1 sample. From VSM studies, the coercive field (H ) of the samples S1, S2, and S3 was found to be 0.00 Oe', 0.10 Oe', 1.69 Oe and the saturation magnetization (M ) was found to be 4.911 emu, 0.897 emu, 0.679 emu, respectively.

Keywords

Four Probe Technique, Differential Scanning Calorimetry, X-Ray Diffraction, Phase Transformation, Room Temperature.

How to Cite this Article?

Prasad, B. B. (2019). A Detailed Experimental Study on Amorphous Fe80-XGdXB20(0<X≤6) Alloys. i-manager's Journal on Physical Sciences, 1(1), 39-43.

References

[1]. Anil, K., Bhatnagar, B., Prasad, B., & Jagannathan, R. (1986). Magnetic properties and crystallization of amorphous Fe40Ni40B20 Alloy. Hyperfine Interactions, 27, 309.
[3]. Prasad, B. B. (2019). Temperature dependence of electrical resistivity and phase transformation studies of amorphous Fe76Nd4B20 alloy. International Journal of Innovative Research in Technology, 5(11), 708-710.
[8]. Prasad, B. B., & Srilalitha, M. D.V. (2015). Study of Crystallization Process of Fe78Tm2B20 and Fe76Tm4B20 Alloys. International Journal of Engineering Research and Applications, 5(5), 82-86.
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