Magnetic transition and large reversible magnetocaloric effect in EuCu1.75P2 compound

doi:10.1088/1674-1056/22/2/027502

Abstract The magnetocaloric effect (MCE) in EuCu_1.75P₂ compound is studied by the magnetization and heat capacity measurements. Magnetization and modified Arrott plots indicate that the compound undergoes a second-order phase transition at T_C～51 K. A large reversible MCE is observed around T_C. The values of maximum magnetic entropy change (-ΔS_M^max) reach 5.6 J·kg^-1·K^-1 and 13.3 J·kg^-1·K^-1 for the field change of 2 T and 7 T, respectively, with no obvious hysteresis loss in the vicinity of Curie temperature. The corresponding maximum adiabatic temperature changes (ΔT_ad^max) are evaluated to be 2.1 K and 5.0 K. The magnetic transition and the origin of large MCE in EuCu_1.75P₂ are also discussed.

Keywords: EuCu_1.75P₂ compound magnetocaloric effect magnetic transition critical behavior

Received: 01 June 2012
Revised: 30 June 2012
Accepted manuscript online:

PACS:	75.30.Sg	(Magnetocaloric effect, magnetic cooling)
	75.30.Kz	(Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.))

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11004044) and the Zhejiang Provincial Natural Science Foundation, China (Grant No. Y4110581).

Corresponding Authors: Huo De-Xuan
E-mail: dxhuo@hdu.edu.cn

Cite this article:

Huo De-Xuan (霍德璇), Liao Luo-Bing (廖罗兵), Li Ling-Wei (李领伟), Li Miao (李妙), Qian Zheng-Hong (钱正洪 ) Magnetic transition and large reversible magnetocaloric effect in EuCu_1.75P₂ compound 2013 Chin. Phys. B 22 027502

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Magnetic transition and large reversible magnetocaloric effect in EuCu1.75P2 compound

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Magnetic transition and large reversible magnetocaloric effect in EuCu_1.75P₂ compound