Neutron Scattering Study on the Crystal Structure, Magnetic Ordering, and Crystalline Electric Field Excitations in an Uranium Metallic Compound U3Pd20Si6

スポンサーリンク

概要

• 論文の詳細を見る

• Systematic neutron scattering experiments were carried out in order to reveal the crystal and magnetic structure as well as the localized character of the uranium 5f electrons in a ternary metallic compound U3Pd20Si6. High-resolution neutron powder patterns were well described by the model calculation assuming the R3Pd20X6 structure. We found the successive magnetic sublattice ordering at the Néel temperature TN =19 K and the Curie temperature TC = 2 K, respectively. Below TN = 19 K the uranium spins on 8c site showed an antiferromagnetic order with the propagation vector Q = [111]. Meanwhile uranium spins on 4a site remained paramagnetic down to TC = 2 K and ordered ferromagnetically below TC. Inelastic scattering experiments revealed clear evidence for the crystalline electric field excitations at the excitation energy of about 13 and 23 meV. We also found a strong magnetic excitation at low energy about 3 meV. A quasi-elastic response was observed above TN, while the inelastic excitation energy showed remarkable temperature dependence below TN. These behaviors involve that the observed low energy response would be the antiferromagnetic spin wave excitation, consistent with the localized character of the 5f electrons. The existence of crystalline electric field and spin wave excitations indicates that U3Pd20Si6 is one of a few example of the uranium intermetallics in which uranium 5f electrons have a localized character.

• Physical Society of Japanの論文
• 2001-08-15

著者

• KOIKE Yoshihiro

  Advanced Science Reseach Center, Japan Atomic Energy Reserach Institute

• METOKI Naoto

  Physics Department, Graduate School of Science, Tohoku University

• Aoki Haruyoshi

  Center For Low Temperature Science Tohoku University

• Kimura Noriaki

  Center For Low Temperature Science Tohoku University

• Tateiwa Naoyuki

  Physics Department Graduate School Of Science Tohoku University

• Komatsubara Takemi

  Physics Department Graduate School Of Science Tohoku University

• Komatsubara Takemi

  Physics Department, Graduate School of Science, Tohoku University, Sendai 980-8545

• Metoki Naoto

  Physics Department, Graduate School of Science, Tohoku University, Sendai 980-8545

• Tateiwa Naoyuki

  Physics Department, Graduate School of Science, Tohoku University, Sendai 980-8545

• Koike Yoshihiro

  Advanced Science Research Center, Japan Atomic Energy Research Institute, Tokai, Naka, Ibaraki 319-1195

• Kimura Noriaki

  Center for Low Temperature Science, Tohoku University, Sendai 980-8545

関連論文

• Field-induced Ferromagnetic Correlation in the Metamagnetic Crossover in CeRu_2Si_2 as Studied by Neutron Scattering(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)
• Crystal-field *_8-like State in Magnetically Ordered Phases of CeP : Its Anisotropy and Influence on Electronic Structure via High-Field Magnetotransport Measurements
• Magnetic Properties of a Pressure-induced Superconductor UGe_2
• Neutron Scattering Study on the Crystal Structure, Magnetic Ordering, and Crystalline Electric Field Excitations in an Uranium Metallic Compound U_3Pd_Si_6
• Anisotropic Lattice Compression and Possible Valence Change in Kondo Compound CeAu_2Si_2
• Neutron Scattering Studies in the Linear-Chain Haldane Materials, NDMAZ and NDMAP : Condensed Matter: Electronic Properties, etc.
• Field-Induced Phase Transitions Driven by Quantum Fluctuation in S=1/2 Anisotropic Triangular Antiferromagnet Cs_2CuBr_4(Field-Induced Magnetic Ordering, Field-Induced Phase Transitions and Dynamics in Quantum Spin Systems)
• Purification of Uranium Metal and High-Quality Single Crystal Growth
• Observation of a Main Fermi Surface in UPt_3 Studied by de Haas-van Alphen Effect
• Observation of a Main Fermi Surface in UPt_3
• Electronic Structure of B-2p State in AlB_2 Single Crystal : Direct Observation of pσ and pπ Density of States
• Magnetization Study of Superconductivity in UPt_3 and CeRu_2
• Coupling between Magnetic and Superconducting Order Parameters and Evidence for the Spin Excitation Gap in the Superconducting State of a Heavy Fermion Superconductor UPd_2Al_3
• Static and Dynamical Properties in the Heavy Fermion Superconductors Upd_2Al_3 and UNi_2Al_3
• Anisotropic Magnetic Phase Diagram of Kondo-Lattice Compound Ce_3Pd_Ge_6 with Quadrupolar Ordering
• Neutron Scattering Experiments at High Pressure on a Heavy Femion Superconductor UPd_2Al_3
• Interplay between Magnetism and Superconductivity in URu_2Si_2 Studied by Neutron Scattering Experiments
• Interplay between Magnetism and Superconductivity in a Heavy Fermion Superconductor, Upd_2Al_3
• Long-Range Antiferromagnetic Spin Correlation below 50 mK in a Heavy Fermion Superconductor UPt_3
• Long Range Antiferromagnetic Ordering Observed Below 20 mK in the Heavy Fermion Superconductor UPt_3
• Neutron Scattering Study of the Magnetic Structure of DyCu_2
• New Features of the Metamagnetic Transition in CeRu_2Si_2 from the dHvA Effect Study under High Pressure : Condensed Matter: Electronic Properties, etc.
• dHvA Effect Study of the Metamagnetic Transition in CeRu_2Si_2 : Transition Behavior of the dHvA Oscillations
• Metamagnetic Transition of Heavy Fermion Uranium Compounds : Upd_2Al_3, URu_2Si_2 and UPt_3
• Field and Spin Dependences of Effective Mass in CeIn_3(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)
• High-Field Investigation on Magnetism in the Localized 5f Electrons System U_3Pd_Si_6
• Electronic Structure of Yb_4As_3
• Third-Order Magnetic Susceptibility and Quadrupolar Order Parameter of Kondo-Lattice Compound Ce_3Pd_Ge_6 : Condensed Matter: Electronic Properties, etc.
• Ferromagnetism vs Paramagnetism and False Quantum Oscillations in Lanthanum-Doped CaB_6 : Condensed Matter: Electronic Properties, etc.
• Acoustic de Haas-van Alphen Effect and Elastic Anomaly of Transverse Mode(C_-C_)/2 in Sr_2RuO_4 : Condensed Matter: Electronic Properties, etc.
• de Haas-van Alphen Effect of FeP in Double Helical Magnetic State : Condensed Matter: Electronic Properties, etc.
• Transport, Thermal and Magnetic Properties of the New Ternary Compound U_3Pd_Si_6: Possibility of a New Localized 5f Electrons System : Condensed Matter: Electronic Properties, etc.
• Josephson Effect between UPt_3 and Nb around the Double Superconducting Transition of UPt_3
• Anisotropy of Upper Critical Magnetic Fields in the Heavy Fermion Superconductor UNi_2Al_3
• Anomalous Field Dependence of Hall Effect in UPd_2Al_3
• Measurement of the Josephson Effect of Heavy-Fermion Superconductor UPt3 as a Test of the Odd-Parity Order Parameter
• Magnetic Properties of a Pressure-induced Superconductor UGe2
• Development of Heat Capacity Measurement System under High Pressure
• Crystal-field Γ8-like State in Magnetically Ordered Phases of CeP: Its Anisotropy and Influence on Electronic Structure via High-Field Magnetotransport Measurements
• Purification of Uranium Metal using the Solid State Electrotransport Method under Ultrahigh Vacuum
• Neutron Scattering Study on the Crystal Structure, Magnetic Ordering, and Crystalline Electric Field Excitations in an Uranium Metallic Compound U3Pd20Si6
• Field-induced Ferromagnetic Correlation in the Metamagnetic Crossover in CeRu_2Si_2 as Studied by Neutron Scattering(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)

もっと見る 閉じる

スポンサーリンク