Square-shape magnetocaloric effect in Mn3GaC

R. Burriel, L. Tocado, E. Palacios, T. Tohei, Hirofumi Wada

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14 Citations (Scopus)

Abstract

We have studied the antiferro-ferromagnetic first-order transition which occurs in the giant magnetocaloric compound Mn3GaC by heat capacity at zero field and at H=5T. At H=0 we have found transitions at Tt1=155.5K and Tt2=165.2K in addition to the ferro-paramagnetic transition at TC=248K. The first one has a large anomalous entropy ΔS/R=0.36 and a strong field dependence. Direct measurements of the temperature change upon adiabatic application of magnetic field gave ΔTS≅-5K, practically independent of the initial temperature and field, over a wide temperature range below Tt1. The results are explained in terms of the magnetic phase diagram.

Original languageEnglish
Pages (from-to)715-718
Number of pages4
JournalJournal of Magnetism and Magnetic Materials
Volume290-291 PART 1
DOIs
Publication statusPublished - Apr 1 2005
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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