Study of a magnetic-cooling material Gd(OH)CO3

Yan-Cong Chen; Lei Qin; Zhao-Sha Meng; Ding-Feng Yang; Chao Wu; Zhendong Fu; Yan-Zhen Zheng; Jun-Liang Liu; Róbert Tarasenko; Martin Orendáč; Jan Prokleška; Vladimír Sechovský; Ming-Liang Tong

doi:10.1039/C4TA01646G

Study of a magnetic-cooling material Gd(OH)CO₃†

Yan-Cong Chen,‡^a Lei Qin,‡^b Zhao-Sha Meng,^a Ding-Feng Yang,^b Chao Wu,*^b Zhendong Fu,^c Yan-Zhen Zheng,*^b Jun-Liang Liu,^a Róbert Tarasenko,^d Martin Orendáč,*^d Jan Prokleška,^e Vladimír Sechovský^e and Ming-Liang Tong*^a

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^a Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education, State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry & Chemical Engineering, Sun Yat-Sen University, Guangzhou, China
E-mail: tongml@mail.sysu.edu.cn

^b Frontier Institute of Science and Technology, and College and Science, Xi'an Jiaotong University, Xi'an 710054, China
E-mail: chaowu@mail.xjtu.edu.cn, zheng.yanzhen@mail.xjtu.edu.cn

^c Institut für Festkörperforschung, Forschungszentrum Jülich, 52425 Jülich, Germany

^d Centre of Low Temperature Physics Faculty of Science, P.J. Šafárik University and Institute of Experimental Physics SAS, Park Angelinum 9, 041 54 Košice, Slovakia
E-mail: martin.orendac@upjs.sk

^e Faculty of Mathematics and Physics, Department of Condensed Matter Physics, Charles University, Ke Karlovu 5, CZ-12116 Prague 2, Czech Republic

Abstract

The magnetocaloric effect of a coordination polymeric material with a repeating unit of Gd(OH)CO₃ has been studied experimentally using isothermal magnetization and heat capacity measurements. The maximum entropy change, −ΔS_m, reaches 66.4 J kg⁻¹ K⁻¹ or 355 mJ cm⁻³ K⁻¹ for ΔH = 7 T and T = 1.8 K. Density functional theory (DFT) calculations show weak and competing antiferromagnetic interactions between the metal centres.

This article is part of the themed collection: 2014 Journal of Materials Chemistry A Hot Articles

Journal of Materials Chemistry A

Study of a magnetic-cooling material Gd(OH)CO₃†

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Journal of Materials Chemistry A