Crystal Structure and Magnetic Properties of the S = 1/2 Quantum Spin System Cu7(TeO3)6F2 with Mixed Dimensionality
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https://figshare.com/articles/dataset/Crystal_Structure_and_Magnetic_Properties_of_the_i_S_i_sup_1_sup_sub_2_sub_Quantum_Spin_System_Cu_sub_7_sub_TeO_sub_3_sub_sub_6_sub_F_sub_2_sub_with_Mixed_Dimensionality/2272705
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The new oxofluoride Cu7(TeO3)6F2 has been synthesized by hydrothermal synthesis. It crystallizes in the triclinic system, space group P1̅. The crystal structure constitutes a Cu–O framework with channels extending along [001] where the F– ions and the stereochemically active lone-pairs on Te4+ are located. From magnetic susceptibility, specific heat, and Raman scattering measurements we find evidence that the magnetic degrees of freedom of the Cu–O–Cu segments in Cu7(TeO3)6F2 lead to a mixed dimensionality with single Cu S = 1/2 moments weakly coupled to spin-chain fragments. Due to the weaker coupling of the single moments, strong fluctuations exist at elevated temperatures, and long-range magnetic ordering evolves at comparably low temperatures (TN = 15 K).
创建时间：
2016-02-17
