X-ray scattering study on charge-and-orbital correlations and phase separation under extreme conditions

• Project/Area Number: 15540350
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Condensed matter physics II
• Research Institution: KEIO UNIVERSITY
• Principal Investigator: SHIMOMURA Susumu Keio University, Faculty of Science and Technology, Instructor, 理工学部, 講師 (00260216)
• Project Period (FY): 2003 – 2005
• Project Status: Completed (Fiscal Year 2005)
• Budget Amount: ¥3,700,000 (Direct Cost: ¥3,700,000); Fiscal Year 2005: ¥500,000 (Direct Cost: ¥500,000); Fiscal Year 2004: ¥1,100,000 (Direct Cost: ¥1,100,000); Fiscal Year 2003: ¥2,100,000 (Direct Cost: ¥2,100,000)
• Keywords: x-ray scattering / charge order / orbital order / insulator-metal transition / magnetic field / high pressure / manganese oxide / electrical resistivity / シンクロトロン放射光 / 遷移金属酸化物 / 希土類化合物 / シンクロトロン方射光 / 磁場中X線回折 / 高圧X線回折 / 巨大磁気抵抗効果 / 電荷整列

Research Abstract

This research focuses on studying phase transitions associated with charge and orbital ordering by means of x-ray scattering in a magnetic field or under high pressure. Main results are as follows.
1.Structural changes through an insulator-metal transition induced by a magnetic field have been investigated in a perovskite-type manganese oxide Eu_<0.6>Sr_<0.4>MnO_3 by x-ray diffraction. The change in the Mn-O-Mn bond angle through the transition qualitatively agrees with the double exchange mechanism. The pressure effect was also studied in a compound exhibiting the charge and orbital ordering. Pressure-induced phase transition to a disordered phase was found. In addition, an indication of the transition to a different type of the charge and orbital ordering was found.
2.X-ray powder diffraction experiments using synchrotron radiation were conducted in a mixed valence system of Fe_2BO_4. The structural properties associated with the charge ordering were analyzed by the Rietveld method.
3.The electrical resistivity of RNiC_2 compounds, where R is rare-earth, shows anomalous temperature dependences. A set of satellite reflections was found below the metal-insulator transition temperature. This result suggests that the charge density wave is developed below the transition temperature.
4.X-ray intensity fluctuation spectroscopy experiments using coherent x-rays were carried out at SPring-8. Speckle patterns were observed in a sample exhibiting an order-disorder transition.
5.X-ray diffraction experiments under high magnetic fields using synchrotron radiation (SPring-8) have been performed in low-dimensional systems and materials with multipole order.

Research Products

• [Journal Article] Study of High-Field Magnetic Phases of the Low-Carrier-System Cep by Synchrotron Radiation X-ray Diffraction (2005)
  • Author(s): A.Hannan, D.Kawana, K.Kuwahara, M.Kohgi, Y.Narumi, Y.Tabata, S.Shimomura, Y.Tanaka, K.Katsumata
  • Journal Title: Journal of the Physical Society of Japan 74 Pages: 2301-2309
  • NAID: 110001979709
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Manipulating the Multipole Moments in CeB_6 by Magnetic Fields (2005)
  • Author(s): Y.Tanaka, K.Katsumata, S.Shimomura, Y.Onuki
  • Journal Title: Journal of the Physical Society of Japan 74 Pages: 2201-2204
  • NAID: 110001979691
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] The giant magneto-volume effect in solid oxygen (2005)
  • Author(s): K.Katsumata, S.Kimura, U.Staub, Y.Narumi, Y.Tanaka, S.Shimomura, T.Nakamura, S.W.Lovesey, T.Ishikawa, H.Kitamura
  • Journal Title: Journal of the Physical : Condensed Matter 17
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Synchrotron X-ray Diffraction Studies of a-Gd_2S_3 (2005)
  • Author(s): K.Katsumata, A.Kikkawa, Y.Tanaka, S.Shimomura, S.Ebisu, S.Nagata
  • Journal Title: Journal of the Physical Society of Japan 74 Pages: 1598-1601
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Study of High-Field Magnetic Phases of the Low-Carrier-System CeP by Synchrotron Radiation X-ray Diffraction (2005)
  • Author(s): A.Hannan, D.Kawana, K.Kuwahara, M.Kohgi, Y.Narumi, Y.Tabata, S.Shimomura, Y.Tanaka, K.Katsumata
  • Journal Title: J.Phys.Soc.Jpn. 74 Pages: 2301-2309
  • NAID: 110001979709
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Manipulating the Multipole Moments in CeB_6 by Magnetic Fields (2005)
  • Author(s): Y.Tanaka, K.Katsumata, S.Shimomura, Y.Onuki
  • Journal Title: J.Phys.Soc.Jpn. 74 Pages: 2201-2204
  • NAID: 110001979691
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] The giant magneto-volume effect in solid oxygen (2005)
  • Author(s): K.Katsumata, S.Kimura, U.Staub, Y.Narumi, Y.Tanaka, S.Shimomura, T.Nakamura, S.W.Lovesey, T.Ishikawa, H.Kitamura
  • Journal Title: J.Phys.Cond.Matter 17
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Synchrotron X-ray Diffraction Studies of α-Gd_2S_3 (2005)
  • Author(s): K.Katsumata, A.Kikkawa, Y.Tanaka, S.Shimomura, S.Ebisu, S.Nagata
  • Journal Title: J.Phys.Soc.Jpn. 74 Pages: 1598-1601
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Synchrotron X-ray Diffraction Studies of α-Gd_2S_3 (2005)
  • Author(s): K.Katsumata, A.Kikkawa, Y.Tanaka, S.Shimomura, S.Ebisu, S.Nagata
  • Journal Title: Journal of the Physical Society of Japan 74 Pages: 1598-1601
• [Journal Article] The giant magneto-volume effect in solid oxygen (2005)
  • Author(s): K.Katsumata, S.Kimura, U.Staub, Y.Narumi, Y.Tanaka, S.Shimomura, T.Nakamura, S.W.Lovesey, T.Ishikawa, H.Kitamura
  • Journal Title: Journal of Physics : Condensed Matter 17
• [Journal Article] Study of High-Field Magnetic Phases of the Low-Carrier-System CeP by Synchrotron Radiation X-ray Diffraction (2005)
  • Author(s): A.Hannan, D.Kawana, K.Kuwahara, M.Kohgi, Y.Narumi, Y.Tabata, S.Shimomura, Y.Tanaka, K.Katsumata
  • Journal Title: Journal of the Physical Society of Japan 74 Pages: 2301-2309
  • NAID: 110001979709
• [Journal Article] Direct and quantitative determination of the orbital ordering in CeB_6 by X-ray diffraction (2004)
  • Author(s): Y.Tanaka, U.Staub, K.Katsumata, S.W.Lovesey, J.E.Lorenzo, Y.Karumi, V.Seagnoli, S.Shimomura, Y.Tabata, Y.Onuki, Y.Kuramoto, A.Kikkawa, T.Ishikawa, H.Kitamura
  • Journal Title: Europhysics Letters 68 Pages: 671-677
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Structural Change on the Magnetic Field-Induced Insulator-to-Metal Transition in Distorted Perovskite Eu_0.6Sr_0.4MnO_3 (2004)
  • Author(s): S.Nakamura, S.Shimomura, N.Ikeda, S.Nimori, T.Takeuchi, K.Itoh
  • Journal Title: Journal of the Physical Society of Japan 73 Pages: 3059-3063
  • NAID: 110001979256
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Lattice Constants, Electrical Resistivity and Specific Heat of RNiC_2 (2004)
  • Author(s): M.Murase, A.Tobo, H.Onodera, Y.Hirano, T.Hosaka, S.Shimomura, N.Wakabayashi
  • Journal Title: Journal of the Physical Society of Japan 73 Pages: 2790-2794
  • NAID: 110001979206
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Synchrotron X-ray Diffraction Studies of the Incommensurate Phase of a Spin-Peierls System CuGeO_3 in Strong Magnetic Fields (2004)
  • Author(s): Y.Narumi, K.Katsumata, Y.Tabata, S.Kimura, Y.Tanaka, T.Nakamura, S.Shimomura, et al.
  • Journal Title: Journal of the Physical Society of Japan 73 Pages: 2650-2653
  • NAID: 110001979185
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Observation of a lattice instability at the field-induced phase transition of the spin-gapped compound Cu_2 (C_5H_12N_2)_2Cl_4 (2004)
  • Author(s): J.E.Lorenzo, K.Katsumata, Y.Narumi, S.Shimomura, Y.Tanaka, M.Hagiwara, H.Mayaffre, C.Berthier, O.Piovesana, T.Ishikawa, H.Kitamura
  • Journal Title: Physical Review B 69 Pages: 220409-220409
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Synchrotron X-ray Diffraction Studies on Magnetic Materials in High Magnetic Fields (2004)
  • Author(s): Y.Narumi, K.Katsumata, Y.Tanaka, T.Nakamura, S.Shimomura, Y.Tabata, S.Kimura, M.Matsuda
  • Journal Title: PHYSICA B 345 Pages: 78-81
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Non-resonant X-ray Bragg diffraction by CeB_6 (2004)
  • Author(s): Y.Tanaka, U.Staub, Y.Narumi, K.Katsumata, V.Scagnoli, S.Shimomura, Y.Tabata, Y.Onuki
  • Journal Title: PHYSICA B 345 Pages: 78-81
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] The Coexistence of Magnetic Phases at the First-Order Phase Transition of a Metamagent FeCl_22H_2O Studied by X-ray Diffraction (2004)
  • Author(s): Y.Narumi, K.Katsumata, T.Nakamura, Y.Tanaka, S.Shimomura, T.Ishikawa, M.Yabashi
  • Journal Title: Journal of the Physical : Condensed Matter 16
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Magnetic Field Induced Phase Transition in Distorted Perovskite Eu_0.6Sr_0.4MnO_3 (2004)
  • Author(s): S.Nakamura, S.Shimomura, N.Ikeda, M.Mizumaki, H.Ohsumi, S.Nimori, K.Itoh
  • Journal Title: Journal of Magnetism and Magnetic Materials 272-276 Pages: 424-425
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] 「研究成果報告書概要(欧文)」より (2004)
  • Author(s): Y.Tanaka, U.Staub, K.Katsumata, S.W.Lovesey, J.E.Lorenzo, Y.Narumi, V.Scagnoli, S.Shimomura, Y.Tabata, Y.Onuki, Y.Kuramoto, A.Kikkawa, T.Ishikawa, H.Kitamura
  • Journal Title: Europhysics Letters 68 Pages: 671-677
• [Journal Article] Structural Change on the Magnetic Field-Induced Insulator-to-Metal Transition in Distorted Perovskite Eu_<0.6>Sr_<0.4>MnO_3 (2004)
  • Author(s): S.Nakamura, S.Shimomura, N.Ikeda, S.Nimori, T.Takeuchi, K.Itoh
  • Journal Title: J.Phys.Soc.Jpn. 73 Pages: 3059-3063
  • NAID: 110001979256
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Lattice Constants, Electrical Resistivity and Specific Heat of RNiC_2 (2004)
  • Author(s): M.Murase, A.Tobo, H.Onodera, Y Hirano, T.Hosaka, S.Shimomura, N.Wakabayashi
  • Journal Title: J.Phys.Soc.Jpn. 73 Pages: 2790-2794
  • NAID: 110001979206
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Synchrotron X-ray Diffraction Studies of the Incommensurate Phase of a Spin-Peierls System CuGeO_3 in Strong Magnetic Fields (2004)
  • Author(s): Y Narumi, K.Katsumata, Y.Tabata, S.Kimura, Y.Tanaka, T.Nakamura, S.Shimomura, M.Matsuda, I.Harada, Y.Nishiyama, T.Ishikawa, H.Kitamura, T.Hara, T.Tanaka, K.Tamasaku, M.Yabashi, S.Goto, H.Ohashi, K.Takeshita, T.Ohata, T.Matsushita, T.Bizen
  • Journal Title: J.Phys.Soc.Jpn. 73 Pages: 2650-2653
  • NAID: 110001979185
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Observation of a lattice instability at the field-induced phase transition of the spin-gapped compound Cu_2(C_5H_<12>N_2)_2Cl_4 (2004)
  • Author(s): J.E.Lorenzo, K.Katsumata, Y.Narumi, S.Shimomura, Y.Tanaka, M.Hagiwara, H.Mayaffre, C.Berthier, O.Piovesana, T.Ishikawa, H.Kitamura
  • Journal Title: Phys.Rev.B 69 Pages: 220409-220409
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Synchrotron X-ray Diffraction Studies on Magnetic Materials in High Magnetic Fields (2004)
  • Author(s): Y.Narumi, K.Katsumata, Y.Tanaka, T.Nakamura, S.Shimomura, Y.Tabata, S.Kimura, M.Matsuda
  • Journal Title: PHYSICA B 346 Pages: 11-14
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] The Coexistence of Magnetic Phases at the First-Order Phase Transition of a Metamagnet FeCl_22H_2O Studied by X-ray Diffraction (2004)
  • Author(s): Y.Narumi, K.Katsumata, T.Nakamura, Y.Tanaka, S.Shimomura, T.Ishikawa, M.Yabashi
  • Journal Title: J.Phys.Condensed Mat. 16
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Magnetic Field Induced Phase Transition in Distorted Perovskite Eu_<0.6>Sr_<0.4>MnO_3 (2004)
  • Author(s): S.Nakamura, S.Shimomura, N.Ikeda, M.Mizumaki, H.Ohsumi, S.Nimori, K.Itoh
  • Journal Title: J.Mag.Mag.Mat. 272-276 Pages: 424-425
  • Description: 「研究成果報告書概要(欧文)」より
• [Journal Article] Structural Change on the Magnetic Field-Induced Insulator-to-Metal Transition in Distorted Perovskite Eu_<0.6>Sr_<0.4>MnO_3 (2004)
  • Author(s): S.Nakamura, S.Shimomura, N.Ikeda, S.Nimori, T.Takeuchi, K.Itoh
  • Journal Title: Journal of the Physical Society of Japan 73 Pages: 3059-3063
  • NAID: 110001979256
• [Journal Article] Observation of a lattice instability at the field-induced phase transition of the spin-gapped compound Cu_2(C_5H_<12>N_2)_2Cl_4 (2004)
  • Author(s): J.E.Lorenzo, K.Katsumata, Y.Narumi, S.Shimomura, Y.Tanaka, M.Hagiwara, H.Mayaffre, C.Berthier, O.Piovesana, T.Ishikawa, H.Kitamura
  • Journal Title: Physical Review B 69 Pages: 220409-220409
• [Journal Article] Synchrotron X-ray Diffraction Studies of the Incommensurate Phase of a Spin-Peierls System CuGeO_3 in Strong Magnetic Fields (2004)
  • Author(s): Y.Narumi, K.Katsumata, Y.Tabata, S.Kimura, Y.Tanaka, T.Nakamura, S.Shimomura, M.Matsuda, I.Harada, Y.Nishiyama, T.Ishikawa, H.Kitamura, T.Hara, T.Tanaka, K.Tamasaku, M.Yabashi, S.Goto, H.Ohashi.K.Takeshita, T.Ohata, T.Matsushita, T.Bizen
  • Journal Title: Journal of the Physical Society of Japan 73 Pages: 2650-2653
  • NAID: 110001979185
• [Journal Article] Direct and quantitative determination of the orbital ordering in CeB_6 by X-ray diffraction (2004)
  • Author(s): Y.Tanaka, U.Staub, K.Katsumata, S.W.Lovesey, J.E.Lorenzo, Y.Narumi, V.Scagnoli, S.Shimomura, Y.Tabata, Y.Onuki, K.Kuramoto, A.Kikkawa.T.Ishikawa, H.Kitamura
  • Journal Title: Europhysics Letters 68 Pages: 671-677
• [Journal Article] Magnetic field-induced phase transition in distorted perovskite Eu_0.6Sr_0.4MnO_3 (2003)
  • Author(s): S.Nakamura, S.Shimomura, N.Ikeda
  • Journal Title: Spring-8 Research Frontiers 2003 Pages: 50-51
  • Description: 「研究成果報告書概要(和文)」より
• [Journal Article] Magnetic field-induced phase transition in distorted perovskite Eu_<0.6>Sr_<0.4>MnO_3 (2003)
  • Author(s): S.Nakamura, S.Shimomura, N.Ikeda
  • Journal Title: SPring-8 Research Frontiers 2003 Pages: 50-51
  • Description: 「研究成果報告書概要(欧文)」より
• [Publications] Y.Narumi, K.Katsumata, T.Nakamura, Y.Tanaka, S.Shimomura, T.Ishikawa, M.Yabashi: "The coexistence of magnetic phases at the first-order phase transition of a metamagnet FeCl_22H_2O studied by x-ray diffraction"Journal of Physics : Condensed Matter. 16. L57-L63 (2004)
• [Publications] S.Nakamura, S.Shimomura, N.Ikeda, M.Mizumaki, H.Ohsumi, S.Nimori, K.Itoh: "Magnetic Field Induced Phase Transition in Distorted Perovskite Eu_<0.6>Sr_<0.4>MnO_3"Journal of Magnetism and and Magnetic Materials. (in press). (2004)
• [Publications] Y.Tanaka, U.Staub, Y.Narumi, K.Katsumata, V.Scagnoli, S.Shimomura, Y.Tabata, Y.Onuki: "Non-resonant X-ray Bragg diffraction by CeB_6"Physica B. (in press). (2004)