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Indexed by:期刊论文

Date of Publication:2012-09-01

Journal:RARE METAL MATERIALS AND ENGINEERING

Included Journals:SCIE、PKU、ISTIC

Volume:41

Page Number:384-387

ISSN No.:1002-185X

Key Words:transition metal compounds; thermal hysteresis; magnetocaloric effect; first-order phase transition

Abstract: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.