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论文类型：期刊论文

发表时间：2012-09-01

发表刊物：RARE METAL MATERIALS AND ENGINEERING

收录刊物：SCIE、PKU、ISTIC

卷号：41

页面范围：384-387

ISSN号：1002-185X

关键字：transition metal compounds; thermal hysteresis; magnetocaloric effect; first-order phase transition

摘要：The Mn1.3Fe0.7P0.45Si0.55 compound was prepared by mechanical alloying (MA) technology. The structure, magnetism and magnetocaloric effect in Mn1.3Fe0.7P0.45Si0.55 compound have been investigated. The results show that the compound mainly crystallizes in the Fe2P-type hexagonal structure with space group p (6) over bar2(m) symmetry. A ferromagnetic to paramagnetic first-order phase transition occurs in the vicinity of their Curie temperature. The Curie temperature is about 315 K, and the thermal hysteresis is about 4 K in Mn1.3Fe0.7P0.45Si0.55 compound. The maximal magnetic-entropy change of the compound reaches to 10.3 J/(kg.K) in a field change of 0 to 1.5 T. The low-cost raw materials, the simple preparation techniques, the smaller thermal hysteresis, the ideal cooling temperature and the large magnetocaloric effect make Mn1.3Fe0.7P0.45Si0.55 compound a new applicable material for room-temperature magnetic refrigeration applications.