Vol. 32 No. 3 (2022)
Papers

Mn\(_{55-x}\)Co\(_x\)Bi\(_{45}\) Melt Spun Ribbons: Microstructures and Magnetic Properties

Truong Xuan Nguyen
Institute of Materials Science, Vietnam Academy of Science and Technology, No.18, Hoang Quoc Viet Road, Cau Giay district, Hanoi, Vietnam
Anh Kha Vuong
Faculty of pedagogy, Ha Noi Metropolitan University, No. 98, Duong Quang Ham road, Cau Giay District, Hanoi, Vietnam
Ngan Thuy Thi Dang
Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Hanoi, Vietnam
Nam Hoai Nguyen
Institute of Materials Science, Vietnam Academy of Science and Technology, No.18, Hoang Quoc Viet Road, Cau Giay district, Hanoi, Vietnam
Nam Hong Pham
Institute of Materials Science, Vietnam Academy of Science and Technology, No.18, Hoang Quoc Viet Road, Cau Giay district, Hanoi, Vietnam
Quynh Van Nguyen
University of Science and Technology of Hanoi, Vietnam Academy of Science and Technology, No. 18, Hoang Quoc Viet road, Cau Giay District, Hanoi, Vietnam
Tuan Van Dinh
Electric Power University, No. 235, Hoang Quoc Viet road, Cau Giay District, Hanoi, Vietnam
Vuong Van Nguyen
Institute of Materials Science, Vietnam Academy of Science and Technology, No.18, Hoang Quoc Viet Road, Cau Giay district, Hanoi, Vietnam

Published 27-03-2022

Keywords

  • Melt – spun ribbons,
  • Microstructures,
  • DSC traces,
  • Saturation magnetization,
  • Magnetic properties.

How to Cite

Nguyen, T. X., Vuong, A. K., Dang, N. T. T., Nguyen, N. H., Pham, N. H., Nguyen , Q. V., Dinh, T. V., & Nguyen, V. V. (2022). Mn\(_{55-x}\)Co\(_x\)Bi\(_{45}\) Melt Spun Ribbons: Microstructures and Magnetic Properties. Communications in Physics, 32(3). https://doi.org/10.15625/0868-3166/16597

Abstract

In this paper, we present the effect of Cobalt (Co) addition on the crystallization, microstructures and magnetic properties of Mn55-xCoxBi45 (x = 0, 5, 10, 20) melt – spun ribbons. The ribbons were prepared by the melt-spinning techique and subsequent anneal at 280 oC for 5 h. The investigations by using X-ray diffraction (XRD), Differential Scanning Calorimetry (DSC) traces as well the Vibration Sample Magnetometer  (VSM) measurements result in the optimal content of Co added to the MnBi system is arounf 5 %at. The larger Co content causes the eutectic Mn-Co formation which restricts the reaction between Mn and Bi to form MnBi ferromagnetic phase responsible for ribbons’ performance the saturation magnetization Ms. The maximum saturation magnetization Ms of 65emu/g and the coercivity iHc of 4.7 kOe was achived for the ribbon of Mn50Co5Bi45. The effect of Co content on the microstructures and magnetic properties of  Mn55-xCoxBi45 melt – spun ribbons will be discussed in detail.

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