Neutron-Scattering Study of Magnetic Excitation in Six-Spin-Ring System Cu_3WO_6
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概要
- 論文の詳細を見る
Cl13WO6 has a unique structure in which Cu" (,5 : 172) ions are arranged in six-spin rings.Susceptibility measurements imply a spin-singlet ground state with a spin gap. In order to elucidate magnetic excitations, we performed inelastic neutron scattering on a C1l3W06 powder sam-pie. Two peaks are observed at 11 and 14 meV in energy spectra at low temperatures, indicatingsinglet-triplet excitations. The gaps are temperature independent. There is almost no disper-siom in the magnetic excitations. The intensity around 11 meV decreases rapidly with increasingtemperature. Constant-w scans for the 11 meV peak exhibit an oscillating Q-dependence, whichwe ascribe to a structure factor of the ring. These results are in qualitative agreement with asimple model of an isolated S : l /2 six-spin ring with first, second and third nearest-neighborantiferromagnetic exchange interactions.
- 社団法人日本物理学会の論文
- 1996-02-15
著者
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UCHINOKURA Kunimitsu
Department of Advanced Materials Science, The University of Tokyo
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SHIRANE Gen
Department of Physics, Brookhaven National Laboratory
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HIROTA Kazuma
Department of Physics,Tohoku University
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Shirane G
Department Of Physics Brookhaven National Laboratory
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Shirane Gen
Department Of Physics Brookhaven National Laboratory
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Hirota K
Department Of Physics Tohoku University
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Hirota Kazuma
Department Of Physics Tohoku University
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HASE Masashi
The Institute of Physical and Chemical Research (RIKEN)
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SASAGO Yoshitaka
Department of Applied Physics,The University of Tokyo
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HASE Masashi
National Institute for Materials Science (NIMS)
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Shirane G.
Department of physics, Brookhaven National Laboratory
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Shirane Gen
Brookhavcn National Laboratory Upion
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Uchinokura Kunimitsu
Department Of Advanced Materials Science The University Of Tokyo
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Uchinokura Kunimitsu
Department Of Applied Physics The University Of Tokyo:(also) Department Of Advanced Materials Scienc
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Sasago Y
Department Of Applied Physics The University Of Tokyo
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Uchinokura K
Department Of Advanced Materials Science The University Of Tokyo
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Sasago Yoshitaka
Department Of Applied Physics The University Of Tokyo
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Hirota Kazuma
Department of Earth and Space Science, Faculty of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
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