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

来源：

CRYOGENICS | 1999年 / 39卷 / 11期

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

页码：915 / 919

页数：5

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

← 1 2 →