Influences of La and Ce doping on giant magnetocaloric effect of EuTiO

doi:10.1088/1674-1056/27/1/017501

Abstract Giant reversible magnetocaloric effects and magnetic properties in Eu_0.9R_0.1TiO₃ (R=La, Ce) are investigated. The antiferromagnetic ordering of pure EuTiO₃ can significantly change to be ferromagnetic as substitution of La (x=0.1) and Ce (x=0.1) ions for Eu²⁺ ions. The values of -ΔS_M and RC are evaluated to be 10.8 J/(kg·K) and 51.8 J/kg for Eu_0.9Ce_0.1TiO₃ and 11 J/(kg·K) and 39.3 J/kg for Eu_0.9La_0.1TiO₃ at a magnetic field change of 10 kOe, respectively. The large low-field enhancements of -ΔS_M and RC can be attributed to magnetic phase transition. The giant reversible MCE and large RC suggest that Eu_0.9R_0.1TiO₃ (R=La, Ce) compounds could be promising materials in low temperature and low magnetic field refrigerants.

Keywords: magnetocaloric effect magnetic entropy change magnetic phase transformation

Received: 01 September 2017
Revised: 02 October 2017
Accepted manuscript online:

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

Fund: Project supported by the National Key Research and Development Program of China (Grant No. 2017YFB0702704), the National Natural Science Foundation of China (Grant Nos. 11504266, 51676198, and 51371075), the Tianjin Natural Science Foundation, China (Grant No. 17JCQNJC02300), and the National Key Foundation for Exploring Scientific Instrument of China (Grant No. 2014YQ120351).

Corresponding Authors: Zhao-Jun Mo
E-mail: mozhaojun@iphy.ac.cn

Cite this article:

Zhao-Jun Mo(莫兆军), Qi-Lei Sun(孙启磊), Jun Shen(沈俊), Mo Yang(杨墨), Yu-Jin Li(黎玉进), Lan Li(李岚), Guo-Dong Liu(刘国栋), Cheng-Chun Tang(唐成春), Fan-Bin Meng(孟凡斌) Influences of La and Ce doping on giant magnetocaloric effect of EuTiO 2018 Chin. Phys. B 27 017501

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Influences of La and Ce doping on giant magnetocaloric effect of EuTiO

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