Magnetocaloric properties of a first-order magnetic transition system ErCo2

被引:97
作者
Wada, H [1 ]
Tomekawa, S [1 ]
Shiga, M [1 ]
机构
[1] Kyoto Univ, Dept Mat Sci & Engn, Sakyo Ku, Kyoto 60601, Japan
关键词
magnetocaloric effect; magnetic entropy; first-order phase transition;
D O I
10.1016/S0011-2275(99)00121-6
中图分类号
O414.1 [热力学];
学科分类号
摘要
The magnetocaloric effect was examined for ErCo2, which shows a first-order magnetic transition from a ferrimagnetic to paramagnetic state at 32 K. A large magnetic entropy change was caused by a magnetic field. The corresponding entropy change Delta S and the adiabatic temperature change Delta T-ad are 12 J/K mol and 13 K, respectively in a change of magnetic field 0-8 T at 32 K. The substitution of 20% Y for Er leads to a reduction of the magnetocaloric properties by 20-30%. The origin of the large magnetocaloric effect is also discussed. (C) 2000 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:915 / 919
页数:5
相关论文
共 15 条
[1]  
Aleksandryan V.V., 1988, PHYS MET METALL, V66, P50
[2]  
Andreev A.V., 1985, PHYS MET METALLOGR+, V59, P57
[3]   ALLOYS OF THE FE-RH SYSTEM AS A NEW CLASS OF WORKING MATERIAL FOR MAGNETIC REFRIGERATORS [J].
ANNAORAZOV, MP ;
ASATRYAN, KA ;
MYALIKGULYEV, G ;
NIKITIN, SA ;
TISHIN, AM ;
TYURIN, AL .
CRYOGENICS, 1992, 32 (10) :867-872
[4]  
Buschow K. H. J., 1980, Ferromagnetic materials. A handbook on the properties of magnetically ordered substances, vol.1, P297, DOI 10.1016/S1567-2719(80)01007-4
[5]   ELECTRONIC AND MAGNETIC-PROPERTIES OF ERXY1-XCO2 COMPOUNDS [J].
DUC, NH ;
HIEN, TD ;
BROMMER, PE ;
FRANSE, JJM .
JOURNAL OF PHYSICS F-METAL PHYSICS, 1988, 18 (02) :275-294
[6]   Metamagnetic transition and magnetocaloric effect in ErCo2 [J].
Giguere, A ;
Foldeaki, M ;
Schnelle, W ;
Gmelin, E .
JOURNAL OF PHYSICS-CONDENSED MATTER, 1999, 11 (36) :6969-6981
[7]   ITINERANT ELECTRON METAMAGNETISM IN YCO2 [J].
GOTO, T ;
FUKAMICHI, K ;
SAKAKIBARA, T ;
KOMATSU, H .
SOLID STATE COMMUNICATIONS, 1989, 72 (09) :945-947
[8]  
GSCHNEIDER KA, 1994, APPL PHYS LETT, P25364
[9]  
Hashimoto T, 1986, ADV CRYOGEN ENG, V32, P261
[10]   CALORIMETRIC STUDY ON MAGNETISM OF ERCO2 [J].
IMAI, H ;
WADA, H ;
SHIGA, M .
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1995, 140 :835-836