Crystal Structure and Electronic State of the DisorderedS=1 System (LixV1−x)3BO5withx≃0.3

✍ Scribed by Masashige Onoda

• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 442 KB
• Volume: 141
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.1998.7965

✦ Synopsis

The crystal structure and electronic state of the (Li x V 1؊x ) 3 BO 5 system with xK0.3 have been explored through measurements of the X-ray four-circle diffraction, electron transport, and magnetization. The crystal data at 297 K show an orthorhombic structure with space group Pbam; a ‫؍‬ 9.195(1) A > , b ‫؍‬ 12.209(1) A > , c ‫؍‬ 2.9922(9) A > , and Z ‫؍‬ 4. The structure determined with the residual factors of R ‫؍‬ 0.017 and R w ‫؍‬ 0.018 for 1048 independent reflections is of a ludwigite type; Li and V atoms are located at the centers of an octahedron of oxygens with mixed occupancy, and the B atom resides in the middle of the oxygen triangles. The V-V bonded linear trimer may exist there. The variable-range-hopping-like transport and the transition from a localized state with SK1 to a spin-glass-like state are revealed, which are basically consistent with the structural aspect.