スズキ ケンタロウ   Suzuki Kentaro
  鈴木 健太郎
   所属   神奈川大学  理学部 理学科
    神奈川大学大学院  理学研究科 理学専攻(化学領域)
   職種   教授
言語種別 英語
発行・発表の年月 1997/02
形態種別 学術雑誌
査読 査読あり
標題 Magnetism of a Two-dimensional Weak-ferromagnetic Organic Radical Crystal, 1,3,5-Triphenyl-6-oxoverdazyl
執筆形態 共著
掲載誌名 J. Phys. Soc. Jpn.
掲載区分国外
巻・号・頁 66(7),pp.2147-2156
著者・共著者 M. Mito, H. Nakano, T. Kawae, M. Hitaka, S. Takaki, H. Deguchi, K. Suzuki, K. Mukai, K. Takeda
概要 A genuine organic radical crystal 1,3,5-triphenyl-6-oxoverdazyl (TOV) has been revealed to be an S =1/2 two-dimensional (2D) weak-ferromagnetic Heisenberg antiferromagnet with the exchange interaction 2 J / k B =-9.0 K by the experiments of magnetic susceptibility, heat capacity, magnetization and electron paramagnetic resonance. The anomalous temperature dependence of the weak ferromagnetism at low temperatures is qualitatively explained by a four-sublattice model with two kinds of Dzyaloshinsky-Moriya (D-M) vectors of opposite sign on the a c -plane. The staggered susceptibility, which is a fictitious but intrinsic quantity for antiferromagnets, is estimated in TOV by making use of the canted weak ferromagnetic moments which dominate below 6 K. Especially the rapid growth of the magnetic susceptibility below 6 K is explained by the staggered susceptibility which makes the crossover effect from 2D Heisenberg to 2D Ising system, triggered by above the D-M anisotropy.
DOI 10.1143/JPSJ.66.2147
ISSN 1347-4073
PermalinkURL http://journals.jps.jp/doi/10.1143/JPSJ.66.2147