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Magnetic, Photoluminescent and Semiconductor Properties of a 4f-5d Bromide Compound

Wen-Tong Chen


A novel 4f5d material (HgDy6Br12)Hg8Br24 (1) is prepared by hydrothermal reactions and structurally characterized by single crystal X-ray diffraction. Compound 1 is characterized by a two-dimensional (2D) layered structure. A photoluminescence measurement with solid-state samples shows that this compound exhibits a strong emission in the blue region. A narrow optical band gap of 1.97 eV is revealed by a solid-state UV/Vis diffuse reflectance spectrum. The variable-temperature magnetic susceptibility obeys the Curie-Weiss law (cm= c/(Tq)) with C = 0.78 K and a Weiss constant θ = 0.38 K as revealed by the magnetic measurements, suggesting the existence of an antiferromagnetic interaction.


Lanthanide; mercury; magnetism; photoluminescence; semiconductor

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