Correlation Between Structure And The Magnetic Properties Of Amorphous And Nanocrystalline Fe<sub>74</sub>Cu<sub>0.5</sub>Nb<sub>3</sub>Si<sub>13.5</sub>B<sub>9</sub> Alloys

Authors

  • Siba P Mondal Department of Physics, Khulna University of Engineering & Technology, Khulna
  • Kazi Hanium Maria Department of Physics, University of Dhaka, Dhaka
  • SS Sikder Department of Physics, Khulna University of Engineering & Technology, Khulna
  • Shireen Akhter Materials Science Division, Atomic Energy Centre, Dhaka
  • MA Hakim Materials Science Division, Atomic Energy Centre, Dhaka
  • Shamima Choudhury Department of Physics, University of Dhaka, Dhaka

DOI:

https://doi.org/10.3329/jbas.v35i2.9423

Keywords:

FINEMET, XRD, Grain size, Permeability, Saturation, Magnetization

Abstract

Structural and magnetic measurements have been performed on the FINEMET type of ribbons with nominal composition of Fe74Cu0.5Nb3Si13.5B9 synthesized by rapid solidification technique. The crystallization behavior and the nanocrystal formation have been studied by differential thermal analysis (DTA) and X-ray diffraction (XRD). The crystallization onset temperatures determined by XRD are in good agreement with DTA results. Magnetic permeability and magnetization measurements have been carried out using inductance analyzer and vibrating sample magnetometer (VSM). Magnetic permeability sensitively depends on the annealing temperature which increases sharply with the increase of annealing temperature. Maximum permeability corresponding to optimum annealing temperature (Ta) was observed at Ta = 575°C. Saturation magnetization, Ms, increases with Ta for the sample and finally decreases for annealing at a temperature much higher than peak crystallization temperature. The results show that the amounts of Cu and Nb are very important for the soft magnetic properties of FINEMET alloys.

Key words: FINEMET; XRD; Grain size; Permeability; Saturation; Magnetization

DOI: http://dx.doi.org/10.3329/jbas.v35i2.9423

JBAS 2011; 35(2): 187-195

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How to Cite

Mondal, S. P., Maria, K. H., Sikder, S., Akhter, S., Hakim, M., & Choudhury, S. (2012). Correlation Between Structure And The Magnetic Properties Of Amorphous And Nanocrystalline Fe<sub>74</sub>Cu<sub>0.5</sub>Nb<sub>3</sub>Si<sub>13.5</sub>B<sub>9</sub> Alloys. Journal of Bangladesh Academy of Sciences, 35(2), 187–195. https://doi.org/10.3329/jbas.v35i2.9423

Issue

Vol. 35 No. 2 (2011)

Section

Articles