Field dependence of magnetic entropy change in Mn5Ge3 near room temperature

Lalita, A. Rathi, Pardeep, Ajay Kumar Verma, B. Gahtori, Arvind Gautam, R. P. Pant, P. D. Babu, G. A. Basheed

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


We present the investigation of the magnetic field dependence of magneto-caloric properties in Mn5Ge3 with a near-room temperature second order phase transition (SOPT) at Tc ≃ 297.5 K. The isothermal entropy change (∣ΔSM∣) exhibits a high-field (H ≥ 3 T) power-law behavior with exponent value of 0.58 (near TC), in corroboration with critical exponents study. The maximum entropy change (∣ΔSM∣max∣) exhibits a H2∕3 dependence with addition of spatial inhomogeneity and higher order magnetization (up to M6) terms in Landau′s theory of SOPT. The nearly identical magnetic field evolution of magnetocaloric effect and a reasonably high refrigerant capacity of 398 J/kg (at 5 T) for inexpensive and abundant Mn5Ge3 make it a promising alternative to rare-earth Gadolinium for near-room temperature magnetic refrigeration technology.

Original languageEnglish
Article number159908
JournalJournal of Alloys and Compounds
Publication statusPublished - 25 Sept 2021
Externally publishedYes


  • Critical exponents
  • Magnetic entropy change
  • Magnetocaloric effect

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry


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