1997 年度実績報告書

モット転移系3d遷移金属酸化物の物質設計と物性開拓

研究課題

研究課題/領域番号	07237103
研究機関	東京大学
研究代表者	十倉好紀東京大学, 大学院・工学系研究科, 教授 (30143382)
研究分担者	吉沢英樹東京大学, 物性研究所, 助教授 (00174912) 高野幹夫京都大学, 化学研究所, 教授 (70068138) 熊谷健一北海道大学, 理学部物理学科, 教授 (70029560) 安岡弘志東京大学, 物性研究所, 教授 (50026027) 藤森淳東京大学, 大学院・理学系研究科, 助教授 (10209108)
キーワード	モット転移 / ペロブスカイト / 巨大磁気抵抗効果 / 3d遷移金属酸化物 / 金属-絶縁体転移 / 電荷整列 / スピンラダー / 軌道整列
研究概要	3d遷移金属酸化物およびカルコゲン化・有機物を対象に,モット転移とその近傍にある異常な金属状態について,集中的・包括的な研究を行った。まず、フィリングとバンド幅を共に制御したペロブスカイト型Ti酸化物について、モット転移の臨界的挙動、特に量子臨界的近傍の金属相の特徴を電子比熱光スペクトル、光電子スペクトル、NMRの測定によって明らかにした。また、巨大磁気抵抗効果を示すペロブスカイト型Mn酸化物については、ホール濃度の関数としてのスピンダイナミクス、格子構造、電子構造の変化の様子が詳しく調べられ、軌道整列状態や軌道自由度が関係すると考えられる金属相の異常が検出された。 Mn酸化物,Ni酸化物に共通して見られる電荷整列の相転移については、良質単結晶試料を用いた。輸送現象、分光、中性子散乱測定が進められ、スピンと電荷と軌道の各自由度の揺らぎ/秩序と物性の相関が詳しく議論され始めた。一方、スピンラダー系での超伝導の発見によって最近関心を集めているスピンギャップを有するモット系、Cu、V、Co酸化物について、反強磁性との競合、ドープ状態でのスピン・電荷ダイナミクスなどの知見が良質試料を用いて得らた。

研究成果
(105件)

すべてその他

すべて文献書誌 (105件)

[文献書誌] T.Saitoh: "Low energy κ-dependent electronic sturucture of the layered magnetoresistive oxide La_<1.2>Sr_<1.8>Mn_2O_7" MRS'97 Proceedings"Science and Technology of Magnetic Oxides". (in press). (1998)
[文献書誌] J.Q.Li: "Strnctural properties and charge ordering transition in LaSr_2Mn_2O_7" MRS'97 Proceedings"Science and Technology of Magnetic Oxides". (in press). (1998)
[文献書誌] V.Kiryukhin: "X-ray induced insulator-metal taransitions in CMR manganites" MRS'97 Proceedings"Science and Technology of Magnetic Oxides". (in press). (1998)
[文献書誌] D.S.Dessau: "κ-dependent electronic sturucture,a pseudogap,and strong coupling effects in a layered magnetoresistive oxide" MRS'97 Proceedings"Science and Technology of Magnetic Oxides". (in press). (1998)
[文献書誌] Y.Murakami: "Direct observation of charge-and orbital-ordering La_<0.5>Sr_<1.5>MnO_4" Phys.Rev.Lett.(in press). (1998)
[文献書誌] T.Ishikawa: "Optical probe of anisotropic and incoherent charge dynamics in a layered ferromagnet:La_<1.2>Sr_<1.8>Mn_2O_7" Phys.Rev.B. 57(in press). (1998)
[文献書誌] Y.Tokura: Current opinion in solid state & meterials Science. (in press). (1998)
[文献書誌] Y.Okimoto: "Photonic phase control of magnetic oxides" J.Lig.Cryst.Mol.Cryst.(in press). (1998)
[文献書誌] Y.Okimoto: "Charge ordering and disordering transitions in Pr_<1-x>Ca_xMnO_3" Phys.Rev.B. 57(in press). (1998)
[文献書誌] T.Mori: "Spatial properties of the photoinduced transition in Pr_<0.7>Ca_<0.3>MnO_3" J.Phys.Soc.Jpn.66. 3570-3576 (1997)
[文献書誌] A.Chainani: "Temperature dependence of the electronic structure of the charge-ordering manganite Pr_<0.5>Sr_<0.5>MnO_3" Phys.Rev.B. /bf56. R15513-R15516 (1997)
[文献書誌] T.Kimura: "Pressure-enhanced interplane tunneling magnetoresistance in a layered manganite crystal" Phys.Rev.Lett.79. 3720-3723 (1997)
[文献書誌] T.Katsufuji: "Transport and magnetic properties of a Mott-Hubbard system whose bandwidth and band filling are both controllable:R_<1-x>Ca_xTiO_<3+y/2>" Phys.Rev.B. 56. 10145-10153 (1997)
[文献書誌] Y.Moritomo: "Enhanced electron-lattice coupling in La_<1-x>Sr_xMnO_3 near the metal-insulator phase boundary" Phys.Rev.B. 56. 12190-12195 (1997)
[文献書誌] H.Kuwahara: "Spin-charge-lattice coupled phase transitions in bandwidth-controlled systems:(Nd,Sm)_<1/2>Sr_<1/2>MnO_3" Phys.Rev.B. 56. 9386-9396 (1997)
[文献書誌] H.Kuwahara: "Low-field colossal magnetoresistance in bandwidth-controlled manganites" J.Appl.Phys.81. 4954-4956 (1997)
[文献書誌] Y.Furukawa: "NMR study of ferromagnetic YTiO_3 and antiferromagnetic LaTiO_3" Physica B. 237-238. 39-40 (1997)
[文献書誌] Y.Moritomo: "Chemical and external pressure effects on ferromagnetic manganites" Physica B. 237-238. 26-27 (1997)
[文献書誌] Y.Tomioka: "Critical change of magnetoresistance with bandwidth and doping in perovskite manganites" Appl.Phys.Lett.70. 3609-3611 (1997)
[文献書誌] Y.Tokura: "Metal-insulator phenomena in perovskites of transition metal oxide" Physica B. 237-238. 1-5 (1997)
[文献書誌] Y.Tomioka: "Magnetic-field-induced metal-insulator transition in perovskite-type manganese oxides" Physica B. 237-238. 6-10 (1997)
[文献書誌] J.S.Zhou: "Pressure-induced polaronic to itinerant transition in La_<1-x>Sr_xMnO_3 crystals" Phys.Rev.Lett.79. 3234-3237 (1997)
[文献書誌] A.Asamitsu: "Current switching of resistive states in magnetoresistive manganites" Nature. 388. 50-52 (1997)
[文献書誌] J.Q.Li: "Charge ordered states in La_<1-x>Sr_xFeO_3" Phys.Rev.Lett.79. 4257-4260 (1997)
[文献書誌] H.Kawano: "Magnetic ordering and relation to the metal-insulator transition in Pr_<1-x>Sr_xMnO_3 and Nd_<1-x>Sr_xMnO_3 with x〜1/2" Phys.Rev.Lett.78. 4253-4256 (1997)
[文献書誌] S.Yamaguchi: "Local lattice distortion during the spin-state transition in LaCoO_3" Phys.Rev.B. 55. R8666-R8669 (1997)
[文献書誌] V.Kiryukhin: "An X-ray-induced insulator-metal transition in a magnetoresistive manganite" Nature. 386. 813-815 (1997)
[文献書誌] Y.Moritomo: "Bandwidth-and doping-dependent pressure effects on the ferromagnetic transition in perovskite manganites" J.Phys.Soc.Jpn.66. 556-559 (1997)
[文献書誌] Y.Moritomo: "Pressure effects on charge-ordering transitions in perovskite manganites" Phys.Rev.B. 55. 7549-7556 (1997)
[文献書誌] T.G.Perring: "Antiferromagnetic short range order in a two-dimensional manganite exhibiting giant magnetoresistance" Phys.Rev.Lett.78. 3197-3200 (1997)
[文献書誌] Y.Okimoto: "Variation of electronic structure in La_<1-x>Sr_xMnO_3(0【less than or equal】x【less than or equal】0.3)as investigated by optical conductivity spectra" Phys.Rev.B. 55. 4206-4214 (1997)
[文献書誌] Y.Tomioka: "Reentrant transition of the charge-ordered state in perovskite manganites" J.Phys.Soc.Jpn.66. 302-305 (1997)
[文献書誌] H.Yoshizawa: "Bandwidth-control-induced insulator-metal transition in Pr_<0.65>(Ca_<1-y>Sr_y)_<0.35>MnO_3 and Pr_<0.7>Ca_<0.3>MnO_3" Phys.Rev.B. 55. 2729-2732 (1997)
[文献書誌] M.Kasai: "Colossal magnetoresistance in Sm_<1-x>Sr_xMnO_3 films" J.Appl.Phys.80. 6894-6897 (1997)
[文献書誌] E.Pellegrin: "Soft X-ray magnetic circular dichroism study of the colossal magnetoresistance compound La_<1-x>Sr_xMnO_3" J.Elect.Spect.Rel.Pheno.86. 115-118 (1997)
[文献書誌] K.Maiti: "Electronic Structure of One-dimensional Cuprate Sr_2CuO_3" Europhys.Lett.37. 359-364 (1997)
[文献書誌] T.Mizokawa: "Photoemission and X-Ray Absorption Study of the Hole-Doped Ladder System La_<1-x>Sr_xCuO_<2.5>" Phys.Rev.B. 55. R13373-R13376 (1997)
[文献書誌] J.Matsuno: "Photoemission study of metal-insulator transition in CuIr_2S_4" Phys.Rev.B. 55. R15979-R15982 (1997)
[文献書誌] T.Mizokawa: "Spin,Charge and Orbital Ordering Mn Perovskite Oxides Studied by Model Hartree-Fock Calculations" Phys.Rev.B. 56. R493-R496 (1997)
[文献書誌] T.Saitoh: "Electronic Structure and Magnetic States in La_<1-x>Sr_xCoO_3 Studied by Photoemission and X-Ray Absorption Spectroscopy" Phys.Rev.B. 56. 1290-1295 (1997)
[文献書誌] A.Ino: "Chemical-Potential Shift in Overdoped and Underdoped La_<2-x>Sr_xCuO_4" Phys.Rev.Lett.79. 2101-2104 (1997)
[文献書誌] K.Fujioka: "Electronic Structure of SrRuO_3" Phys.Rev.B. 56. 6380-6383 (1997)
[文献書誌] T.Saitoh: "Temperature-Dependent Valence-Bnad Photoemission Spectra of La_<1-x>Sr_xMnO_3" Phys.Rev.B. 56. 8836-8840 (1997)
[文献書誌] T.Mizokawa: "Hartree-Fock Study of Charge-Ordered States in La_<1-x>Sr_xCuO_4 and La_<1-x>Sr_xNiO_4" Phys.Rev.B. 56. 11920-11924 (1997)
[文献書誌] T.Tsujioka: "Hubbard Splitting and Electron Correlation in the Ferromagnetic Metal CrO_2" Phys.Rev.B. 56. 15509-15512 (1997)
[文献書誌] E.Z.Kurmaev: "Excitation Energy Dependence of SL_<2,3> X-Ray Fluoresent Emission of BaNiS_2" Phys.Letters A. 235. 191-194 (1997)
[文献書誌] T.Mizokawa: "Description of Spin and Charge Domain Walls in Doped Perovskite-Type 3d Transition-Metal Oxides based on Superexchange" Phys.Rev.Lett.80. 1320-1323 (1998)
[文献書誌] A.Fujimori: "Photoemission Spectroscopy of Correlated Transition-Metal Compounds in the Charge-Transfer Regime" Physica B. 237-238. 137-141 (1997)
[文献書誌] K.Mamiya: "Photoemission Study of Pyrite-Type Transition-Metal Chalcogenides MS_<2-x>Se_x(M=Fe,Co,Ni)" Physica B. 237-238. 390-391 (1997)
[文献書誌] S.Suga: "High-Resolution Photoemission Study of Nd_<0.5>Sr_<0.5>MnO_3:Temperature Dependence and Resonance Spectra" Physica B. 237-238. 413-414 (1997)
[文献書誌] K.Ikushima: "Magnetic Properties in the Normal State of LuNi_2B_2C Observed by ^<61>Ni and ^<11>B NMR" J.Phys.Soc.Jpn.66. 1130-1137 (1997)
[文献書誌] H.Yasuoka: "Pseudo Spin Gap High-Tc Oxides observed by NMR" Hyperfine Interactions. 105. 27-34 (1997)
[文献書誌] A.Goto: "Phase diagram for the spin pseudogap in LaBa_2Cu_3O_y studied by NMR" Phys.Rev.B. 55. 12736-12741 (1997)
[文献書誌] N.Fujiwara: "Spin fluctuations in S=1/2 double-linear-chain LiV_2O_5 studied by ^7Li NMR" Phys.Rev.B. 55. 11945-11948 (1997)
[文献書誌] S.Fujiyama: "Anomalous Spin Excitation in the Metallic State of La_<2-x>Sr_xCuO_4 Observed by Cu NQR" J.Phys.Soc.Jpn.66. 2864-2869 (1997)
[文献書誌] T.Ohama: "The Orbital Character in the Spin-Peierls System NaV_2O_5" J.Phys.Soc.Jpn.66. 3008-3011 (1997)
[文献書誌] H.Yasuoka: "Pseudo Spin Gap in High-Tc's Manifested by the NMR Experiments" Physica C. 282-287. 119-122 (1997)
[文献書誌] M.Takano: "Impurity Effects on a 2-leg Spin Ladder Compound SrCu2O3" Physica C. 282-287. 149-152 (1997)
[文献書誌] K.Kumagai: "Local Distortions in the BiO_6 Ochtahera Sublattice of BaPb_xBi_<1-x>O_3 as seen by ^<137>Ba NMR/NQR" Physica C. 274. 209-220 (1997)
[文献書誌] Y.Matsuda: "Interlayer Phase Coherence in the Vortex State of Bi_2Sr_2CaCu_2O_8 Probed by Josephson Plasma Resonance" Phys.Rev.Lett.78. 1972-1975 (1997)
[文献書誌] K.Kumagai: "NMR Study of Carrier Doping Effects on Spin Gaps in Spin Ladder Sr_<14-x>A_xCu_<24>O_<41>(A=Ca,Y and La)" Phys.Rev.Lett.78. 1992-1995 (1997)
[文献書誌] Y.Matsuda: "Excitation of Josephson Plasma and Vortex Oscillation Modes in Bi_2Sr_2CaCu_2O_8 in Parallel Magnetic Fields" Phys.Rev.B. 55. R8685-R8688 (1997)
[文献書誌] Y.Furukawa: "NMR Study of Ferromagnetic YTiO_3 and Antiferromagnetic LaTiO_3" Physica B. 237-238. 156-158 (1997)
[文献書誌] S.Tsujj: "NMR Study of Metal-Insulator Transition Spinel CuIr_2(S_<1-x>Se_x)_4" Physica B. 237-238. 156-158 (1997)
[文献書誌] I.Chong: "Growth of Heavily Pb-Substituted Bi-2201 Single Crystals by a Floating Zone Method" Physica C. (1997)
[文献書誌] Y.Matsuda: "Interlayer Phase Coherence in the Vortex State of Bi_2Sr_2CaCu_2O_8 Proved by Josephson Plasma Resonance" Physica C. 282-287. 391-394 (1997)
[文献書誌] Y.Furukawa: "^<47/49>Ti and ^<139>La NMR Studies on Mott Transition in La_<1-x>Sr_xTiO_3" Physica C. 282-287. 1103-1104 (1997)
[文献書誌] Y.Furukawa: "NMR Study on a Metal-Insulator Transition in Oxysulfides(La_<1-x>Ca_xO)Cu_<1-x>Ni_xS" Physica C. 282-287. 1105-1106 (1997)
[文献書誌] S.Tsuji: "Metal-Insulator Transition in the Spinel CuIr_2(S_<1-x>Se_x)_4 System Studies by NMR" Physica C. 282-287. 1107-1108 (1997)
[文献書誌] K.Kumagai: "NMR Study of Hole-doping Effect on Spin Gaps in Sr_<14-x>A_xCu_<24>O_<41>(A=Ca,Y,and La)by NMR Studies" Physica C. 282-287. 1343-1344 (1997)
[文献書誌] A.Yamanaka: "NMR/NQR Stud ies of Hyperfine Field and Electric Field Gradient in RSr_2Cu_2GaO_7,RBa_2Cu_2NbO_8 and(R_<1-x>Ce_x)Sr_2Cu_2MO_<10>" Physica C. 282-287. 1363-1364 (1997)
[文献書誌] M.Kosugi: "Infuluence of Columner Defects on Interlayer Coherence in Bi_2Sr_2CaCu_2O_8 from Josephson Plasma Resonance" Physica C. 282-287. 2073-2074 (1997)
[文献書誌] M.B.Gaifulin: "Interlayer Josephson Coupling in the Vortex Solid State of Bi_2Sr_2CaCu_2O_8 from Josephson Plasma Resonance" Physica C. 282-287. 2221-2222 (1997)
[文献書誌] M.B.Gaifulin: "Collective Electromagneic Wave Excitation in Bi_2Sr_2CaCu_2O_8 in Magnetic Field Nealy Parallel to the CuO_2 Planes" Physica C. 282-287. 2429-2430 (1997)
[文献書誌] M.Kosugi: "Coupling Transition of the Vortex Liquid in Bi_2Sr_2CaCu_2O_8 with Columnar Defects" Phys.Rev.Lett.79. 3763-3766 (1997)
[文献書誌] M.Takano: "Impurity Effects on a 2-Leg Spin Ladder Compound SrCu_2O_3" Physica C. 282-287. 149-152 (1997)
[文献書誌] N.Kobayashi: "Compounds and Phase Relations in the SrO-CaO-CuO System under High Pressure" J.Solid State Chem.132. 274-283 (1997)
[文献書誌] T.Ohtani: "Phase Transitions in Quasi-One-Dimensional Selenide BaNbSe_3 and Superconductivity in BaNb_2Se_5" J.Solid State Chem.132. 274-283 (1997)
[文献書誌] H.Kageyama: "Magnetic Anisotropy of Ca_3Co_2O_6 with Ferromagnetic Ising Chains" J.Phys.Soc.Jpn.66. 3996-4000 (1997)
[文献書誌] T.Saitoh: "Temperature-Dependent Valence-Band Photoemission Spectra of La_<1-x>Sr_xMnO_3" Phys.Rev.B. 56. 8836-8840 (1997)
[文献書誌] M.Azuma: "Switching of the Gapped Single Spin-Liquid State to an Antiferromagnetically Ordered State in Sr(Cu_<1-x>Zn_x)_2O_3" Phys.Rev.B. 55. R8658-R8661 (1997)
[文献書誌] M.Takano: "High Pressure Synthesis in Inorganic Systems" Cur.Opin.in Sol.Sta.Mater.Sci.2. 166-173 (1997)
[文献書誌] T.Mizokawa: "Photoemission and X-Ray-Absorption Study of the Hole-Doped Ladder System La_<1-x>Sr_xCuO_<2.5>" Phys.Rev.B. 55. R13373-R13376 (1997)
[文献書誌] T.Saitoh: "Electronic Structure and Temperature-Induced Paramagnetism in LaCoO_3" Phys.Rev.B. 55. 4257-4266 (1997)
[文献書誌] T.Saitoh: "Electronic Structure and Magnetic States in La_<1-x>Sr_xCoO_3 Studied by Photoemission and X-Ray-Absorption Spectroscopy" Phys.Rev.B. 56. 1290-1295 (1997)
[文献書誌] K.Nozawa: "Transport Properties of a Quasi-One Dimensional Ladder Compound La_<1-x>Sr_xCuO_<2.5>" (1997)
[文献書誌] H.Yoshizawa: "Bandwidth-control induced insulator-metal transition in Pr_<0.65>(Ca_<1-y>Sr_y)_<0.35>MnO_3 and Pr_<0.7>Ca_<0.3>MnO_3" Phys.Rev.B. 55. 2729-2732 (1997)
[文献書誌] H.Kawano: "Magnetic ordering and relation to the metal-insulator transition in Pr_<1-x>Sr_xMnO_3 and Nd_<1-x>Sr_xMnO_3 with x〜1/2" Phys.Rev.Lett.78. 4253-4256 (1997)
[文献書誌] R.Kajimoto: "Charge ordering and spin dynamics in Pr_<1-x>Ca_xMnO_3" Physica B. (in press). (1998)
[文献書誌] H.Kawano: "Two-dimensional anisotropy in a layered metallic antiferromagnet RE_<1-x>Sr_xMnO_3 with x〜1/2" Physica B. (in press). (1998)
[文献書誌] H.Takagi: "Borocarbide superconductors-Materials and physical properties" Physica B. 237-238. 292-295 (1997)
[文献書誌] M.Azuma: "Switching of the gapped singlet spin-liquid state to an antiferromagnetically ordered state in Sr(Cu_<1-x>Zn_x)_2O_3" Phys.Rev.B. 55. 8658-8661 (1997)
[文献書誌] M.Nohara: "Magnetic Field Dependence of the Low-Temperature Specific Heat of the Borocarbide Superconductor LuNi_2B_2C" J.Phys.Soc.Jpn.66. 1888-1891 (1997)
[文献書誌] K.Ikushima: "Magnetic Properties in the Normal State of LuNi_2B_2C Observed by ^<61>Ni and ^<11>B NMR" J.Phys.Soc.Jpn.66. 1130-1137 (1997)
[文献書誌] S.Koshihara: "Ferromagnetic Order Induced by Photogenerated Carriers in Magnetic III-V Semiconductor Heterostructures of(In,Mn)As/GaSb" Phys.Rev.Lett.78. 4617-4620 (1997)
[文献書誌] M.Takano: "Impurity effects a 2-leg spin ladder compound SrCu_2O_3" Physica C. 282-287. 149-152 (1997)
[文献書誌] N.E.Hussey: "Anisotropic resistivity of YBa_2Cu_4O_8:incoherent to metallic crossover in the out-of-plane transport" Phys.Rev.B. 56. 11423-11426 (1997)
[文献書誌] N.E.Hussey: "Magneic field induced dimensional crossover in the normal state of YBa_2Cu_4O_8" Phys.Rev.Lett.(in press). (1998)
[文献書誌] Y.Maeno: "Electronic states of thr superconductor Sr_2RuO_4" Physica C. 282-287. 206-209 (1997)
[文献書誌] H.Takagi: "International scool of physics"Enrico Fermi"lecture note" (1997)
[文献書誌] T.Tonogai: "Proc.AIRAPT-16" (in press), (1998)
[文献書誌] 高木英典、野原実、分担執筆: "超伝導技術とその応用" 丸善, (1997)
[文献書誌] Y.Maeno: "High-Tc Superconductivity 1996:Ten Years after the Discovery" (1997)
[文献書誌] Y.Inoue: "Advances in Superconductivity IX" Springer-Verlag, 4 (1997)
[文献書誌] T.Ida: "Advances in Superconductivity IX" (1997)

1997 年度 実績報告書

モット転移系3d遷移金属酸化物の物質設計と物性開拓

研究代表者

十倉 好紀 東京大学, 大学院・工学系研究科, 教授 (30143382)

研究成果

[文献書誌] T.Saitoh: "Low energy κ-dependent electronic sturucture of the layered magnetoresistive oxide La_<1.2>Sr_<1.8>Mn_2O_7" MRS'97 Proceedings"Science and Technology of Magnetic Oxides". (in press). (1998)

[文献書誌] J.Q.Li: "Strnctural properties and charge ordering transition in LaSr_2Mn_2O_7" MRS'97 Proceedings"Science and Technology of Magnetic Oxides". (in press). (1998)

[文献書誌] V.Kiryukhin: "X-ray induced insulator-metal taransitions in CMR manganites" MRS'97 Proceedings"Science and Technology of Magnetic Oxides". (in press). (1998)

[文献書誌] D.S.Dessau: "κ-dependent electronic sturucture,a pseudogap,and strong coupling effects in a layered magnetoresistive oxide" MRS'97 Proceedings"Science and Technology of Magnetic Oxides". (in press). (1998)

[文献書誌] Y.Murakami: "Direct observation of charge-and orbital-ordering La_<0.5>Sr_<1.5>MnO_4" Phys.Rev.Lett.(in press). (1998)

[文献書誌] T.Ishikawa: "Optical probe of anisotropic and incoherent charge dynamics in a layered ferromagnet:La_<1.2>Sr_<1.8>Mn_2O_7" Phys.Rev.B. 57(in press). (1998)

[文献書誌] Y.Tokura: Current opinion in solid state & meterials Science. (in press). (1998)

[文献書誌] Y.Okimoto: "Photonic phase control of magnetic oxides" J.Lig.Cryst.Mol.Cryst.(in press). (1998)

[文献書誌] Y.Okimoto: "Charge ordering and disordering transitions in Pr_<1-x>Ca_xMnO_3" Phys.Rev.B. 57(in press). (1998)

[文献書誌] T.Mori: "Spatial properties of the photoinduced transition in Pr_<0.7>Ca_<0.3>MnO_3" J.Phys.Soc.Jpn.66. 3570-3576 (1997)

[文献書誌] A.Chainani: "Temperature dependence of the electronic structure of the charge-ordering manganite Pr_<0.5>Sr_<0.5>MnO_3" Phys.Rev.B. /bf56. R15513-R15516 (1997)

[文献書誌] T.Kimura: "Pressure-enhanced interplane tunneling magnetoresistance in a layered manganite crystal" Phys.Rev.Lett.79. 3720-3723 (1997)

[文献書誌] T.Katsufuji: "Transport and magnetic properties of a Mott-Hubbard system whose bandwidth and band filling are both controllable:R_<1-x>Ca_xTiO_<3+y/2>" Phys.Rev.B. 56. 10145-10153 (1997)

[文献書誌] Y.Moritomo: "Enhanced electron-lattice coupling in La_<1-x>Sr_xMnO_3 near the metal-insulator phase boundary" Phys.Rev.B. 56. 12190-12195 (1997)

[文献書誌] H.Kuwahara: "Spin-charge-lattice coupled phase transitions in bandwidth-controlled systems:(Nd,Sm)_<1/2>Sr_<1/2>MnO_3" Phys.Rev.B. 56. 9386-9396 (1997)

[文献書誌] H.Kuwahara: "Low-field colossal magnetoresistance in bandwidth-controlled manganites" J.Appl.Phys.81. 4954-4956 (1997)

[文献書誌] Y.Furukawa: "NMR study of ferromagnetic YTiO_3 and antiferromagnetic LaTiO_3" Physica B. 237-238. 39-40 (1997)

[文献書誌] Y.Moritomo: "Chemical and external pressure effects on ferromagnetic manganites" Physica B. 237-238. 26-27 (1997)

[文献書誌] Y.Tomioka: "Critical change of magnetoresistance with bandwidth and doping in perovskite manganites" Appl.Phys.Lett.70. 3609-3611 (1997)

[文献書誌] Y.Tokura: "Metal-insulator phenomena in perovskites of transition metal oxide" Physica B. 237-238. 1-5 (1997)

[文献書誌] Y.Tomioka: "Magnetic-field-induced metal-insulator transition in perovskite-type manganese oxides" Physica B. 237-238. 6-10 (1997)

[文献書誌] J.S.Zhou: "Pressure-induced polaronic to itinerant transition in La_<1-x>Sr_xMnO_3 crystals" Phys.Rev.Lett.79. 3234-3237 (1997)

[文献書誌] A.Asamitsu: "Current switching of resistive states in magnetoresistive manganites" Nature. 388. 50-52 (1997)

[文献書誌] J.Q.Li: "Charge ordered states in La_<1-x>Sr_xFeO_3" Phys.Rev.Lett.79. 4257-4260 (1997)

[文献書誌] H.Kawano: "Magnetic ordering and relation to the metal-insulator transition in Pr_<1-x>Sr_xMnO_3 and Nd_<1-x>Sr_xMnO_3 with x〜1/2" Phys.Rev.Lett.78. 4253-4256 (1997)

[文献書誌] S.Yamaguchi: "Local lattice distortion during the spin-state transition in LaCoO_3" Phys.Rev.B. 55. R8666-R8669 (1997)

[文献書誌] V.Kiryukhin: "An X-ray-induced insulator-metal transition in a magnetoresistive manganite" Nature. 386. 813-815 (1997)

[文献書誌] Y.Moritomo: "Bandwidth-and doping-dependent pressure effects on the ferromagnetic transition in perovskite manganites" J.Phys.Soc.Jpn.66. 556-559 (1997)

[文献書誌] Y.Moritomo: "Pressure effects on charge-ordering transitions in perovskite manganites" Phys.Rev.B. 55. 7549-7556 (1997)

[文献書誌] T.G.Perring: "Antiferromagnetic short range order in a two-dimensional manganite exhibiting giant magnetoresistance" Phys.Rev.Lett.78. 3197-3200 (1997)

[文献書誌] Y.Okimoto: "Variation of electronic structure in La_<1-x>Sr_xMnO_3(0【less than or equal】x【less than or equal】0.3)as investigated by optical conductivity spectra" Phys.Rev.B. 55. 4206-4214 (1997)

[文献書誌] Y.Tomioka: "Reentrant transition of the charge-ordered state in perovskite manganites" J.Phys.Soc.Jpn.66. 302-305 (1997)

[文献書誌] H.Yoshizawa: "Bandwidth-control-induced insulator-metal transition in Pr_<0.65>(Ca_<1-y>Sr_y)_<0.35>MnO_3 and Pr_<0.7>Ca_<0.3>MnO_3" Phys.Rev.B. 55. 2729-2732 (1997)

[文献書誌] M.Kasai: "Colossal magnetoresistance in Sm_<1-x>Sr_xMnO_3 films" J.Appl.Phys.80. 6894-6897 (1997)

[文献書誌] E.Pellegrin: "Soft X-ray magnetic circular dichroism study of the colossal magnetoresistance compound La_<1-x>Sr_xMnO_3" J.Elect.Spect.Rel.Pheno.86. 115-118 (1997)

[文献書誌] K.Maiti: "Electronic Structure of One-dimensional Cuprate Sr_2CuO_3" Europhys.Lett.37. 359-364 (1997)

[文献書誌] T.Mizokawa: "Photoemission and X-Ray Absorption Study of the Hole-Doped Ladder System La_<1-x>Sr_xCuO_<2.5>" Phys.Rev.B. 55. R13373-R13376 (1997)

[文献書誌] J.Matsuno: "Photoemission study of metal-insulator transition in CuIr_2S_4" Phys.Rev.B. 55. R15979-R15982 (1997)

[文献書誌] T.Mizokawa: "Spin,Charge and Orbital Ordering Mn Perovskite Oxides Studied by Model Hartree-Fock Calculations" Phys.Rev.B. 56. R493-R496 (1997)

[文献書誌] T.Saitoh: "Electronic Structure and Magnetic States in La_<1-x>Sr_xCoO_3 Studied by Photoemission and X-Ray Absorption Spectroscopy" Phys.Rev.B. 56. 1290-1295 (1997)

[文献書誌] A.Ino: "Chemical-Potential Shift in Overdoped and Underdoped La_<2-x>Sr_xCuO_4" Phys.Rev.Lett.79. 2101-2104 (1997)

[文献書誌] K.Fujioka: "Electronic Structure of SrRuO_3" Phys.Rev.B. 56. 6380-6383 (1997)

[文献書誌] T.Saitoh: "Temperature-Dependent Valence-Bnad Photoemission Spectra of La_<1-x>Sr_xMnO_3" Phys.Rev.B. 56. 8836-8840 (1997)

[文献書誌] T.Mizokawa: "Hartree-Fock Study of Charge-Ordered States in La_<1-x>Sr_xCuO_4 and La_<1-x>Sr_xNiO_4" Phys.Rev.B. 56. 11920-11924 (1997)

[文献書誌] T.Tsujioka: "Hubbard Splitting and Electron Correlation in the Ferromagnetic Metal CrO_2" Phys.Rev.B. 56. 15509-15512 (1997)

[文献書誌] E.Z.Kurmaev: "Excitation Energy Dependence of SL_<2,3> X-Ray Fluoresent Emission of BaNiS_2" Phys.Letters A. 235. 191-194 (1997)

[文献書誌] T.Mizokawa: "Description of Spin and Charge Domain Walls in Doped Perovskite-Type 3d Transition-Metal Oxides based on Superexchange" Phys.Rev.Lett.80. 1320-1323 (1998)

[文献書誌] A.Fujimori: "Photoemission Spectroscopy of Correlated Transition-Metal Compounds in the Charge-Transfer Regime" Physica B. 237-238. 137-141 (1997)

[文献書誌] K.Mamiya: "Photoemission Study of Pyrite-Type Transition-Metal Chalcogenides MS_<2-x>Se_x(M=Fe,Co,Ni)" Physica B. 237-238. 390-391 (1997)

[文献書誌] S.Suga: "High-Resolution Photoemission Study of Nd_<0.5>Sr_<0.5>MnO_3:Temperature Dependence and Resonance Spectra" Physica B. 237-238. 413-414 (1997)

[文献書誌] K.Ikushima: "Magnetic Properties in the Normal State of LuNi_2B_2C Observed by ^<61>Ni and ^<11>B NMR" J.Phys.Soc.Jpn.66. 1130-1137 (1997)

[文献書誌] H.Yasuoka: "Pseudo Spin Gap High-Tc Oxides observed by NMR" Hyperfine Interactions. 105. 27-34 (1997)

[文献書誌] A.Goto: "Phase diagram for the spin pseudogap in LaBa_2Cu_3O_y studied by NMR" Phys.Rev.B. 55. 12736-12741 (1997)

[文献書誌] N.Fujiwara: "Spin fluctuations in S=1/2 double-linear-chain LiV_2O_5 studied by ^7Li NMR" Phys.Rev.B. 55. 11945-11948 (1997)

[文献書誌] S.Fujiyama: "Anomalous Spin Excitation in the Metallic State of La_<2-x>Sr_xCuO_4 Observed by Cu NQR" J.Phys.Soc.Jpn.66. 2864-2869 (1997)

[文献書誌] T.Ohama: "The Orbital Character in the Spin-Peierls System NaV_2O_5" J.Phys.Soc.Jpn.66. 3008-3011 (1997)

[文献書誌] H.Yasuoka: "Pseudo Spin Gap in High-Tc's Manifested by the NMR Experiments" Physica C. 282-287. 119-122 (1997)

[文献書誌] M.Takano: "Impurity Effects on a 2-leg Spin Ladder Compound SrCu2O3" Physica C. 282-287. 149-152 (1997)

[文献書誌] K.Kumagai: "Local Distortions in the BiO_6 Ochtahera Sublattice of BaPb_xBi_<1-x>O_3 as seen by ^<137>Ba NMR/NQR" Physica C. 274. 209-220 (1997)

[文献書誌] Y.Matsuda: "Interlayer Phase Coherence in the Vortex State of Bi_2Sr_2CaCu_2O_8 Probed by Josephson Plasma Resonance" Phys.Rev.Lett.78. 1972-1975 (1997)

[文献書誌] K.Kumagai: "NMR Study of Carrier Doping Effects on Spin Gaps in Spin Ladder Sr_<14-x>A_xCu_<24>O_<41>(A=Ca,Y and La)" Phys.Rev.Lett.78. 1992-1995 (1997)

[文献書誌] Y.Matsuda: "Excitation of Josephson Plasma and Vortex Oscillation Modes in Bi_2Sr_2CaCu_2O_8 in Parallel Magnetic Fields" Phys.Rev.B. 55. R8685-R8688 (1997)

[文献書誌] Y.Furukawa: "NMR Study of Ferromagnetic YTiO_3 and Antiferromagnetic LaTiO_3" Physica B. 237-238. 156-158 (1997)

[文献書誌] S.Tsujj: "NMR Study of Metal-Insulator Transition Spinel CuIr_2(S_<1-x>Se_x)_4" Physica B. 237-238. 156-158 (1997)

[文献書誌] I.Chong: "Growth of Heavily Pb-Substituted Bi-2201 Single Crystals by a Floating Zone Method" Physica C. (1997)

[文献書誌] Y.Matsuda: "Interlayer Phase Coherence in the Vortex State of Bi_2Sr_2CaCu_2O_8 Proved by Josephson Plasma Resonance" Physica C. 282-287. 391-394 (1997)

[文献書誌] Y.Furukawa: "^<47/49>Ti and ^<139>La NMR Studies on Mott Transition in La_<1-x>Sr_xTiO_3" Physica C. 282-287. 1103-1104 (1997)

[文献書誌] Y.Furukawa: "NMR Study on a Metal-Insulator Transition in Oxysulfides(La_<1-x>Ca_xO)Cu_<1-x>Ni_xS" Physica C. 282-287. 1105-1106 (1997)

[文献書誌] S.Tsuji: "Metal-Insulator Transition in the Spinel CuIr_2(S_<1-x>Se_x)_4 System Studies by NMR" Physica C. 282-287. 1107-1108 (1997)

[文献書誌] K.Kumagai: "NMR Study of Hole-doping Effect on Spin Gaps in Sr_<14-x>A_xCu_<24>O_<41>(A=Ca,Y,and La)by NMR Studies" Physica C. 282-287. 1343-1344 (1997)

[文献書誌] A.Yamanaka: "NMR/NQR Stud ies of Hyperfine Field and Electric Field Gradient in RSr_2Cu_2GaO_7,RBa_2Cu_2NbO_8 and(R_<1-x>Ce_x)Sr_2Cu_2MO_<10>" Physica C. 282-287. 1363-1364 (1997)

[文献書誌] M.Kosugi: "Infuluence of Columner Defects on Interlayer Coherence in Bi_2Sr_2CaCu_2O_8 from Josephson Plasma Resonance" Physica C. 282-287. 2073-2074 (1997)

[文献書誌] M.B.Gaifulin: "Interlayer Josephson Coupling in the Vortex Solid State of Bi_2Sr_2CaCu_2O_8 from Josephson Plasma Resonance" Physica C. 282-287. 2221-2222 (1997)

[文献書誌] M.B.Gaifulin: "Collective Electromagneic Wave Excitation in Bi_2Sr_2CaCu_2O_8 in Magnetic Field Nealy Parallel to the CuO_2 Planes" Physica C. 282-287. 2429-2430 (1997)

[文献書誌] M.Kosugi: "Coupling Transition of the Vortex Liquid in Bi_2Sr_2CaCu_2O_8 with Columnar Defects" Phys.Rev.Lett.79. 3763-3766 (1997)

1997 年度実績報告書

十倉好紀東京大学, 大学院・工学系研究科, 教授 (30143382)