Specific heat and magnetic entropy associated with magnetic ordering in al-rich RAL2 sintered compounds

M. Sahashi, H. Niu, Y. Tohkai, K. Inomata, T. Hashimoto, T. Kuzuhara, A. Tomokiyo, H. Yayama

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8 Citations (Scopus)


Crystallographic and thermo-magnetic measurements have been made on the sintered RAl2 intermetallic compounds where R=Gd, Tb, Dy, Ho and Er. These Laves phase compounds are important ferromagnetic substances for the Ericsson type magnetic refrigerator in the temperature range above 10 K. The powder. rnetal-lurgic approach was used to prepare the samples. The sintering characteristics in the R-Al system were clarified in the previous paper. Based on that resuit, the RAl2.2 system was selected in this investigation. Thermo-magnetic measurements show that Curie temperatures for the RA12.2 sintered compounds are inclined to be about 2 to 15 K lower than those for stoichiometric compounds. In this paper, specific heat and magnetic entropy values for the above Al-rich RAl2 high density sintereq compounds are shown in respect to application to magnetic refrigerants in the above 10 K temperature range. Then, the RA13 phase contribution in RA12.2 sintered compounds to niagnetic entropy and its magnetic properties are discussed.

Original languageEnglish
Pages (from-to)2853-2855
Number of pages3
JournalIEEE Transactions on Magnetics
Issue number5
Publication statusPublished - Sept 1987

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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