Anand, Kritika and Christopher, Nithya and Singh, Nidhi (2019) Evaluation of structural and magnetic property of Cr-doped MnBi permanent magnet material. Applied Physics A: Materials Science and Processing , 125 (870). pp. 1-8. ISSN 0947-8396

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In the present study, the effects of doping on the LTP-MnBi phase formation as well as on Mn to Bi ratio in the matrix were investigated. Structural- and magnetic properties of nanocrystalline Mn50-xBi50Crx (x = 0, 1.5, 3, 5) permanent magnet material, prepared by melt-spinning were studied and correlated with the thermal analysis. A more stabilized LTP-MnBi phase is formed with Cr doping. A large enhancement in the coercivity along with magnetization is observed with Cr doping. A magnetization of 54.2 emu/g and a coercivity value of 11.9 kOe were obtained for the composition Mn47Bi50Cr3 at room temperature(,) which increases to 17.5 kOe at 150 degrees C. An interesting correlation exists between the thermal as well as the structural- and magnetic properties of the compound. Also, a decrease in magnetic transition temperature is observed in Cr-doped samples, which has been studied in detail. This decrease in magnetic transition temperature helps in the decoupling of structural- and magnetic transition temperature, thereby leading to a formation of more stable LTP-MnBi compound.

Item Type: Article
Additional Information: Copyright for this article belongs to M/s Springer Verlag.
Subjects: Materials Science
Applied Physics/Condensed Matter
Depositing User: Mr. Yogesh Joshi
Date Deposited: 12 Mar 2020 09:20
Last Modified: 12 Mar 2020 09:20

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