Citation: LI Han SONG, Fen SHI, Wei MA, CHENG Peng. Cryogenic Magnetic Refrigeration Properties of Heterometallic {LnCu₃} Cluster Family[J]. Chinese Journal of Inorganic Chemistry, ;2015, 31(9): 1860-1866. doi: 10.11862/CJIC.2015.248 shu

Cryogenic Magnetic Refrigeration Properties of Heterometallic {LnCu₃} Cluster Family

1.
Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry(MOE), and Collaborative Innovation Center of Chemical Science and Engineering(Tianjin), Nankai University, Tianjin 300071 China

Corresponding author: CHENG Peng,
Received Date: 1 June 2015
Available Online: 14 July 2015
Fund Project: 国家基金委创新团队(No.21421001) (No.21421001)教育部创新团队(IRT13022和13R30) (IRT13022和13R30)111引智计划(B12015) (B12015)天津市自然科学基金(13JCZDJC32200)资助项目。 (13JCZDJC32200)

Based on the survey of Gd-Cu complexes in literatures, a family of {LnCu₃} clusters (Ln=Gd (1), Tb (2), Dy (3)) were selected to study the magnetocaloric effect (MCE) at low temperature due to their isolated Gd-Cu arrangement as well as the pure intramolecular ferromagnetic coupling. A modified one-pot synthetic method based on the reported result was developed to simplify the reaction procedure. Elementary analyses, IR, single crystal/powder X-ray diffraction measurements were carried out to determine the isomorphism and phase purity. Studies of MCEs indicate that complexes 1~3 have a maximum magnetic entropy change (-ΔS_m) of 16.1 (2 K), 6.9 (5 K) and 8.1 (5 K) J·kg^-1·k^-1 for ΔH=0~7 T, respectively. Comparison of the MCE for {GdCu₃} with the reported Gd-Cu clusters emphasizes the importance of weak ferromagnetic interactions in designing of 3d-4f molecular coolers.
- cryogenic magnetic refrigeration;magnetocaloric effect;magnetic entropy change;ferromagnetic interaction
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沈阳化工大学材料科学与工程学院沈阳 110142

Cryogenic Magnetic Refrigeration Properties of Heterometallic {LnCu3} Cluster Family

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Cryogenic Magnetic Refrigeration Properties of Heterometallic {LnCu₃} Cluster Family