Spin-Gap Behavior of CuNb2O6

Katsuaki Kodama; Toshihiko Fukamachi; Hiroshi Harashina; Masaki Kanada; Yoshiaki Kobayashi; Mayumi Kasai; Hisashi Sasaki; Masatoshi Sato; Kazuhisa Kakurai

doi:10.1143/jpsj.67.57

Spin-Gap Behavior of CuNb₂O₆

Katsuaki Kodama, Toshihiko Fukamachi, Hiroshi Harashina, Masaki Kanada, Yoshiaki Kobayashi, Mayumi Kasai, Hisashi Sasaki, Masatoshi Sato, Kazuhisa Kakurai

著者情報

Katsuaki Kodama
Department of Physics, Division of Material Science, Nagoya University, Furo–cho, Chikusa–ku, Nagoya 464–01
CREST, Japan Science and Technology Corporation (JST)
Toshihiko Fukamachi
Department of Physics, Division of Material Science, Nagoya University, Furo–cho, Chikusa–ku, Nagoya 464–01
Hiroshi Harashina
Department of Physics, Division of Material Science, Nagoya University, Furo–cho, Chikusa–ku, Nagoya 464–01
CREST, Japan Science and Technology Corporation (JST)
Masaki Kanada
Department of Physics, Division of Material Science, Nagoya University, Furo–cho, Chikusa–ku, Nagoya 464–01
Yoshiaki Kobayashi
Department of Physics, Division of Material Science, Nagoya University, Furo–cho, Chikusa–ku, Nagoya 464–01
CREST, Japan Science and Technology Corporation (JST)
Mayumi Kasai
Department of Physics, Division of Material Science, Nagoya University, Furo–cho, Chikusa–ku, Nagoya 464–01
Hisashi Sasaki
Department of Physics, Division of Material Science, Nagoya University, Furo–cho, Chikusa–ku, Nagoya 464–01
Masatoshi Sato
Department of Physics, Division of Material Science, Nagoya University, Furo–cho, Chikusa–ku, Nagoya 464–01
CREST, Japan Science and Technology Corporation (JST)
Kazuhisa Kakurai
CREST, Japan Science and Technology Corporation (JST)
Neutron Scattering Laboratory, ISSP, The University of Tokyo, Shirakawa 106–1, Tokai, Ibaraki 319–11

キーワード: CuNb₂O₆, spin gap, neutron inelastic scattering, nuclear relaxation rate

ジャーナル認証あり

1998 年 67 巻 1 号 p. 57-60

DOI https://doi.org/10.1143/jpsj.67.57

詳細

抄録

The magnetic properties of two polymorphs of CuNb₂O₆ with quasi-one-dimensional zig-zag spin (S=1/2) chains of Cu²⁺ ions are studied. The magnetic excitation spectra of Cu spins measured by neutron scattering, and the T-dependence of the longitudinal spin relaxation rate of ⁹³Nb nuclei by NMR indicate the existence of the spin gap in the monoclinic phase whose magnitude is consistent with the one deduced by the detailed analyses of uniform magnetic susceptibility at low temperatures. The behavior in the monoclinic phase is in clear contrast to that found in the orthorhombic phase.

責任著者(Corresponding author)

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