Applied Physics A

, 125:870 | Cite as

Evaluation of structural and magnetic property of Cr-doped MnBi permanent magnet material

  • Kritika Anand
  • Nithya Christopher
  • Nidhi SinghEmail author


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 °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.

Graphic abstract



This work was carried out under CSIR (India) Network Project PSC-0109. KA and NC acknowledge CSIR for financial assistance. Authors would like to thank Radhey Shyam and Naval Kishor for their technical support.


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Academy of Scientific and Innovative Research (AcSIR)GhaziabadIndia
  2. 2.CSIR-National Physical LaboratoryDr. K.S Krishnan MargNew DelhiIndia

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