Neutron Diffraction Investigation of the Metamagnetic Transition in Y_2Cu_2O_5(Field-Induced Magnetic Ordering, Field-Induced Phase Transitions and Dynamics in Quantum Spin Systems)

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概要

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• Y_2Cu_2O_5 shows two successive metamagnetic transitions for magnetic fields (B) parallel to the b-axis, one at B_<c1>〜2.8T and one at B_<c2>≃4.7T. Above B_<c2> the magnetisation gradually increases and saturates at B_S〜7.3T. Generally such metamagnetic transitions are not expected in a Cu^<2+> spin system because of the small anisotropy and hence have never before been observed in this type of compounds. We performed neutron diffraction experiments in zero and applied fields parallel to the b-axis to shed some light on the nature of these metamagnetic transitions. An unexpected magnetic structure with tripling of the unit cell in the b-direction has been observed for applied fields of B_<c1><B<B_<c2>. The possible magnetic structures compatible with the crystal structure symmetry have been determined by means of symmetry analysis and these results are compared to the neutron diffraction and magnetisation data.

• 理論物理学刊行会の論文
• 2005-10-31

著者

• MATSUOKA Yuki

  Department of Materials Science and Engineering, Faculty of Engineering, Osaka University

• Kakurai Kazuhisa

  Asrc Japan Atomic Energy Research Institute

• LEBECH B.

  Materials Research Department, Risφ National Laboratory

• KAKURAI Kazuhisa

  ASRC, Japan Atomic Energy Research Institute

• MOTOKAWA Mitsuhiro

  International Institute for Advanced Studies

• Lebech B.

  Materials Research Department Risφ National Laboratory

• Matsuoka Yuki

  Department Of Physics Nara Women's University

• MATSUOKA Yuki

  Department of Physics, Nara Women's University

関連論文

• Effects of Static Magnetic Field and Hydrostatic Pressure on the Isothermal Martensitic Transformation in an Fe-Ni-Cr Alloy
• Neutron Diffraction Investigation of the Metamagnetic Transition in Y_2Cu_2O_5(Field-Induced Magnetic Ordering, Field-Induced Phase Transitions and Dynamics in Quantum Spin Systems)
• Commensurate to Incommensurate Transition in the Chiral Helimagnet CuB_2O_4(Condensed matter : electronics structure and electrical, magnetic, and optical properties)
• Electron Paramagnetic Resonance and Mossbauer Spectra of Iron Ions in Bizen Pottery

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