Magnetic transition and large reversible magnetocaloric effect

in EuCu1.75P2 compound

1,211,2Huo De-Xuan（霍德璇）, Liao Luo-Bing（廖罗兵）, Li Ling-Wei（李领伟）, Qian

Zheng-Hong（钱正洪）2

1

2Institute of Materials Physics, Hangzhou Dianzi University, Hangzhou 310018, China

China

Center for Integrated Spintronic Device, Hangzhou Dianzi University, Hangzhou 310018,

Abstract

The magnetocaloric effect (MCE) in EuCu1.75P2 compound has been studied by the magnetization and heat capacity measurements. Magnetization and modified Arrott plots indicate that the compound undergoes a second-order phase transition at TC~ 51 K.

A large reversible MCE was observed around TC. The values of maximum magnetic entropy change (- SMmax) reach 5.6 and 13.3 J Kg-1 K-1 for the field change of 2 and 7 T , respectively, with no obvious hysteresis loss in the vicinity of Curie temperature. The corresponding maximum adiabatic temperature changes ( Tadmax) are evaluated to be 2.1 and 5.0 K. The magnetic transition and the origin of large MCE in EuCu1.75P2 were also discussed.

PACS: 75.30.Sg; 75.30.Kz

Keywords: EuCu1.75P2 compound; Magnetocaloric effect; Magnetic transition.