Enhanced hard magnetic properties in partially-doped Mn3−xGdxGa (x ⩽ 0.03)

Sonam Perween, A. Rathi, P. D. Babu, Govind Gupta, B. Sivaiah, R. P. Pant, B. Gahtori, G. A. Basheed

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


The effect of partial (1–3%) rare-earth Gadolinium doping in D022 Mn3Ga hard magnet has been investigated in this work. The Mn3Ga undergoes magnetic transition at Tc ∼ 745 K, which decreases down to Tc∼715 K upon 1% Gd-doping with introduction of mixed Mn valence states, as revealed from XPS study. The hard magnetic behavior of Mn3Ga has been observed in a wide temperature range (up to Tc). More importantly, the partial Gd-doping significantly enhances the room temperature hard magnetic properties i.e. squareness ratio (mr/ms), coercivity (Hc) and energy product (BHmax) from 0.43, 2.73 kOe and 0.39 MGOe (Mn3Ga) to 0.57, 4.25 kOe and 0.5 MGOe (Mn2.97Gd0.03Ga), respectively. The modified Stoner-Wohlfarth model and low-field minor loop analysis reveal the nucleation hardening mechanism for the magnetization reversal. The study proposes the partial rare-earth doping as a new approach to enhance the hard magnetic properties of rare-earth free hard magnets.

Original languageEnglish
Pages (from-to)278-283
Number of pages6
JournalJournal of Magnetism and Magnetic Materials
Publication statusPublished - 1 Mar 2019
Externally publishedYes


  • Coercivity mechanism
  • Heusler alloy
  • Mn-based alloys

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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