Masashige Onoda and Junichi Hasegawa 2003 J. Phys.: Condens. Matter 15 L95 doi:10.1088/0953-8984/15/3/101
A distortion of pseudotetramers coupled with the Jahn–Teller effect in the geometrically frustrated spinel system CdV2O4
FREE ARTICLEMasashige Onoda and Junichi Hasegawa
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For the geometrically frustrated spinel system CdV2O4 with V3+ (S = 1) that undergoes structural and magnetic transitions at Tc1 = 97 K, and may exhibit a transition to the antiferromagnetic state at Tc2 = 35 K, the crystal structures at 299 and 85 K have been determined with space groups Fd
m and I41 /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 V4-tetrahedron block with two kinds of V–V bonds. On the basis of these structural properties, magnetic susceptibilities at temperatures between Tc1 and Tc2 are explained in terms of the tetragonally distorted pseudotetramer model.
- PACS
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71.70.Ej Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect
75.30.Et Exchange and superexchange interactions
75.30.Kz Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.)
- Subjects
- Dates
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Issue 3 (29 January 2003)
Received 19 November 2002
Published 13 January 2003
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A distortion of pseudotetramers coupled with the Jahn–Teller effect in the geometrically frustrated spinel system CdV2O4
Masashige Onoda and Junichi Hasegawa 2003 J. Phys.: Condens. Matter 15 L95
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