TY - JOUR
T1 - Specific heat and magnetic entropy associated with magnetic ordering in al-rich RAL2 sintered compounds
AU - Sahashi, M.
AU - Niu, H.
AU - Tohkai, Y.
AU - Inomata, K.
AU - Hashimoto, T.
AU - Kuzuhara, T.
AU - Tomokiyo, A.
AU - Yayama, H.
N1 - Copyright:
Copyright 2015 Elsevier B.V., All rights reserved.
PY - 1987/9
Y1 - 1987/9
N2 - 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.
AB - 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.
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U2 - 10.1109/TMAG.1987.1065718
DO - 10.1109/TMAG.1987.1065718
M3 - Article
AN - SCOPUS:0023419393
SN - 0018-9464
VL - 23
SP - 2853
EP - 2855
JO - IEEE Transactions on Magnetics
JF - IEEE Transactions on Magnetics
IS - 5
ER -