期刊
JOURNAL OF PHYSICS-CONDENSED MATTER
卷 15, 期 3, 页码 L95-L102出版社
IOP PUBLISHING LTD
DOI: 10.1088/0953-8984/15/3/101
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For the geometrically frustrated spinel system CdV2O4 With V3+ (S = 1) that undergoes structural and magnetic transitions at T-cl = 97 K, and may exhibit a transition to the antiferromagnetic state at T-c2 = 35 K, the crystal structures at 299 and 85 K have been determined with space groups Fd (3) over barm and 14(1)/amd, respectively, by means of x-ray four-circle diffraction. At 85 K, the VO6 octahedron is distorted due to the Jahn-Teller effect with contraction of the V-O bond along the tetragonal c axis, and the network of V ions is achieved by the linkage of a distorted V-4-tetrahedron block with two kinds of V-V bonds. On the basis of these structural properties, magnetic susceptibilities at temperatures between T-cl and T-c2 are explained in terms of the tetragonally distorted pseudotetramer model.
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