Exotic Magnetism of Novel S = 1 Kagome Lattice Antiferromagnet KV3Ge2O9
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概要
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Single crystals of the novel vanadium oxide compound KV3Ge2O9 have been synthesized. This compound has a hexagonal unit cell with the space group P6_{3}/mmc. Its lattice constants are a = 5.8624(4) Å and c = 13.7094(7) Å. KV3Ge2O9 contains layers of edge-shared VO6 octahedra, where V3+ ions with an S = 1 spin form kagome lattice layers separated by double layers of GeO4 tetrahedra. The magnetic susceptibility shows a broad maximum at approximately 70 K, suggesting that magnetic transition is suppressed in spite of the presence of strong antiferromagnetic interactions. Below approximately 20 K, the susceptibility under a magnetic field perpendicular to the kagome plane steeply drops toward zero, while the in-plane susceptibility diverges with reduction in temperature.
- 2012-07-15
著者
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Hara Shigeo
Department Of Materials Science & Technology Nagoya Institute Of Technology
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Sato Hirohiko
Department Of Biotechnology Tokyo University Of Agriculture And Technology
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Narumi Yasuo
Institute For Materials Research Tohoku University
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HARA Shigeo
Department of Dairy Science, The College of Dairying
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