Hole-induced Novel Spin State within Haldane Gap in Nd_<2-x>Ca_xBaNiO_5(Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties)

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概要

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• Static and dynamical spin properties in a hole-doped one-dimensional Haldane chain system have been investigated by magnetization and neutron scattering measurements on antiferromagnetic Nd_<2-x>Ca_xBaNiO_5. Spin-glass-like weak ferromagnetic behavior and an incommensurate dynamical structure were observed, which are similar to those reported in the Haldane system Y_<2-x>Ca_xBaNiO_5. A novel excitation, moreover, has been revealed at 10 meV because of complete the shift in the Haldane gap due to three-dimensional antiferromagnetic ordering, which possibly provides a total picture of a hole-induced quantum Haldane chain.

• 社団法人日本物理学会の論文
• 2005-01-15

著者

• Sasaki Tomoyuki

  Department of Materials Science, Graduate School of Engineering, Tohoku University

• KATANO Susumu

  Advanced Science Research Center, Japan Atomic Energy Agency

• YOKOO Tetsuya

  Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK)

• AKIMITSU Jun

  Department of Physics, Aoyama Gakuin University

• Yokoo Tetsuya

  Institute Of Materials Structure Science High Energy Accelerator Research Organization (kek)

• Yokoo Tetsuya

  Institute Of Materials Structure Science Kek

• Akimitsu Jun

  Department Of Physics And Mathematics Aoyama Gakuin University

• Akimitsu Jun

  Department Of Physics Aoyama Gakuin University

• Sasaki Tomoyuki

  Department Of Electrical Engineering Nagaoka University Of Technology

• Katano Susumu

  Advanced Science Research Center Jaeri

• Sasaki Tomoyuki

  Department Of Physics Aoyama Gakuin University

• Katano Susumu

  Advanced Science Reseach Center, Japan Atomic Energy Reserach Institute, Ibaraki 319-1195

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