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Journal articles
Crystal structure, spectroscopic, optical, thermal and magnetic studies of new orthoborate Sr2Co(BO3)2
Abstract : Single crystals of a novel distrontium cobalt diborate, Sr2Co(BO3)2, were successfully obtained from the melt at
1200 °C of the polycrystalline material. The powder of Sr2Co(BO3)2 compound was synthesized using standard
solid state reaction at 850 °C. The refinement of the structure shows that Sr2Co(BO3)2 crystallizes in the monoclinic
cell with the space group C2/m. The crystal structure is built from [CoO6] octahedra linked to [BO3] triangles
by the vertices and to the SrO9 polyhedra by sharing two faces. The infrared analysis confirms the existence
of BO3 vibrations group’s. The calculated gap energy is Egap ¼ 3.5eV for indirect gap model and Egap ¼ 3.75eV for
direct gap one. The magnetic measurements show that antiferromagnetic interactions are predominant in the
studied borate. The high temperature X-ray diffraction and the differential scanning calorimetry allow to observe
two anomalies in the temperature range of 400–800 °C which correspond to the phase transitions of Sr2Co(BO3)2.
https://hal.archives-ouvertes.fr/hal-02504163
Contributor : Nadine Laffargue <>
Submitted on : Tuesday, March 10, 2020 - 3:05:17 PM
Last modification on : Wednesday, March 11, 2020 - 1:47:35 AM
Contributor : Nadine Laffargue <>
Submitted on : Tuesday, March 10, 2020 - 3:05:17 PM
Last modification on : Wednesday, March 11, 2020 - 1:47:35 AM