Superconductivity at 54K in F-Free NdFeAsO_<1-y>(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
スポンサーリンク
概要
- 論文の詳細を見る
We have synthesized a series of oxygen-deficient, fluorine-free polycrystalline samples with nominal chemical formula NdFeAsO_<1-y> using high-pressure technique. The ZrCuSiAs type crystal structure, as expected for NdFeAsO, is formed as the main phase for the composition 0≤y≤0.6. Sharp superconducting (SC) transition with their transition temperature (T_c) as high as 54K is observed for 0.3≤y≤0.8 samples, which is higher than that of F-doped NdFeAsO. While T_c does not depend on y, SC volume fraction shows maximum at y=0.4. Around the same y, the lattice parameters show discontinuous shrinkage. These experimental results suggest the existence of a stable superconducting phase with a fixed atomic ratio close to Nd:Fe:As:O=1:1:1:0.6, presumably associated with a regular array of oxygen deficiency.
- 社団法人日本物理学会の論文
- 2008-06-15
著者
-
IYO Akira
Nanoelectronics Research Institute (NeRI), AIST
-
KITO Hijiri
Nanoelectronics Research Institute (NeRI), AIST
-
EISAKI Hiroshi
Nanoelectronics Research Institute (NeRI), AIST
-
EISAKI Hiroshi
National Institute of Advanced Industrial Science and Technology
-
KITO Hijiri
National Institute of Advanced Industrial Science and Technology
-
IYO Akira
National Institute of Advanced Industrial Science and Technology
-
Kito Hijiri
Jst Trip
-
Kito Hijiri
National Inst. Advanced Industrial Sci. And Technol. (aist) Ibaraki Jpn
-
Kito Hijiri
Nanoelectronics Research Institute (neri) National Institute Of Advanced Industrial Science And Tech
-
Iyo Akira
National Inst. Advanced Industrial Sci. And Technol. (aist) Ibaraki Jpn
-
Iyo Akira
Nanoelectronics Research Institute (neri) National Institute Of Advanced Industrial Science And Tech
-
Eisaki Hiroshi
Nanoelectronics Research Institute (neri) National Institute Of Advanced Industrial Science And Tech
-
Eisaki Hiroshi
Nanoelectronics Research Institute National Institute Of Advanced Industrial Science And Technology
-
Iyo Akira
National Institute Of Advanced Industrial Science And Technology (aist)
-
Kito Hijiri
National Institute Of Advanced Industrial Science And Technology (aist)
関連論文
- Lattice Dynamics of LaFeAsO_F_x and PrFeAsO_ via Inelastic X-Ray Scattering and First-Principles Calculation(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
- Sheet Dependence on Superconducting Gap in Oxygen-Deficient Iron-Based Oxypnictide Superconductors NdFeAsO_(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
- Effect of Structural Parameters on Superconductivity in Fluorine-Free LnFeAsO_ (Ln=La, Nd)(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
- Effect of K Doping on Phonons in Ba_K_xFe_2As_2
- Two-Dimensional Spin Density Wave State in LaFeAsO
- Observation of Softened Fe Modes in K-Doped BaFe_2As_2 via ^Fe Nuclear Resonant Inelastic Scattering
- Gigantic Effect of Pressure in CeFeAsO_
- Antiferromagnetic Phase Transition in Four-Layered High-T_c Superconductors Ba_2Ca_3Cu_4O_8(F_yO_)_2 with T_c = 55-102K : ^Cu- and ^F-NMR Studies
- ^As NMR Study of Hole-Doped Superconductor Ba_K_xFe_2As_2 (T_c≃38K)(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
- Superconductivity above 50K in LnFeAsO_ (Ln=Nd, Sm, Gd, Tb, and Dy) Synthesized by High-Pressure Technique(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
- Fermi Surface in BaNi_2P_2(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
- Spin Fluctuations and Unconventional Superconductivity in the Fe-Based Oxypnictide Superconductor LaFeAsO_ Probed by ^Fe-NMR(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
- Pressure-Induced Modification of Crystal Structure in NdFeAsO_ (1-y=0.85), Accompanied by Remarkable Suppression of T_c(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
- Genuine Phase Diagram of Homogeneously Doped CuO_2 Plane in High-T_c Cuprate Superconductors(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
- Suppression of Magnetic Order by Pressure in BaFe_2As_2
- Structural Analysis of Fluorine-Free Oxypnictide Superconductor NdFeAsO_ by Electron Diffraction Analysis and Electron Microscopy
- Abnormal Magnetoresistance on Non-superconducting NdFeAsO_
- ^As NMR Study of the Ternary Iron Arsenide BaFe_2As_2(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
- ^As-NQR/NMR Studies on Oxygen-Deficient Iron-Based Oxypnictide Superconductors LaFeAsO_ (y=0, 0.25, 0.4) and NdFeAsO_(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
- 22pYA-2 Superconductivity at 43K in an iron-based layered compound La_Y_xFeAsO_y at ambient pressure
- Superconductivity of NdFeAsO1-y under hydrostatic pressure (Proceedings of the international symposium on Fe-pnictide superconductors)
- Superconductivity at 26K in (Ca_Na_x)Fe_2As_2
- T_c vs n Relationship for Multilayered High-T_c Superconductors(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
- Nanoscale Modulation of Local Barrier Height on Bi-based Cuprate Superconductors Observed by Scanning Tunneling Microscopy/Spectroscopy(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
- Search of Long-Range Magnetic Ordering in Superconducting Five-Layered Cuprate(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
- Switching Dynamics of Bi_2Sr_2CaCu_2O_ Intrinsic Josephson Junctions : Macroscopic Quantum Tunneling and Self-Heating Effect(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
- Thermal Variations of Magnetic Excitation Spectrum in Slightly Overdoped Bi_Sr_CaCu_2O_
- Enhancement of an iron-based layered compound superconducting properties by high pressure synthesis technique (Proceedings of the international symposium on Fe-pnictide superconductors)
- Remarkable Suppression of T_C by Pressure in NdFeAsO_ (y=0.4)
- Superconductivity at 54K in F-Free NdFeAsO_(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
- Fabrication of Ultrasmall High-Quality Bi_2Sr_2CaCu_2O_ Intrinsic Josephson Junctions
- Unconventional Variation of T_c in the Multilayered Cuprate Superconductor (Cu,C)Ba_2Ca_4Cu_5O_y(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
- Disorder-Driven Quantum Phase Transition from Antiferromagnetic Metal to Insulating State in Multilayered High-T_c Cuprate (Cu, C) Ba_2Ca_4Cu_5O_y(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
- Relationship between crystal structure and superconductivity in LnFeAsO1-y (Ln = lanthanide) (Proceedings of the international symposium on Fe-pnictide superconductors)
- Interpretation of Abnormal AC Loss Peak Based on Vortex-Molecule Model for a Multicomponent Cuprate Superconductor
- Multi-Junction Switching in Bi_2Sr_La_CuO_ Intrinsic Josephson Junctions
- Observation of Softened Fe Modes in K-Doped BaFe2As2 via 57Fe Nuclear Resonant Inelastic Scattering
- Origin of $T_{\text{c}}$ Enhancement Induced by Doping Yttrium and Hydrogen into LaFeAsO-Based Superconductors: 57Fe-, 75As-, 139La-, and 1H-NMR Studies
- Coherence Effect of Sign-Reversing $s_{\pm}$-Wave Cooper Pair State in Heavily Overdoped LaFeAsO-based Superconductor: 75As-Nuclear Quadrupole Resonance
- High-T_{\text{c}} Superconductivity with T_{\text{c}} = 52 K under Antiferromagnetic Order in Five-Layered Cuprate Ba2Ca4Cu5O10(F,O)2 with T_{\text{N}} = 175 K: 19F- and Cu-NMR Studies
- Electric Polarization Induced by Néel Order without Magnetic Superlattice: Experimental Study of Cu3Mo2O9 and Numerical Study of a Small Spin Cluster
- Doping Dependence of Normal-State Properties in Iron-Based Oxypnictide Superconductor LaFeAsO1-y Probed by 57Fe-NMR and 75As-NMR/NQR
- Effect of K Doping on Phonons in Ba1-xKxFe2As2
- Single Crystal Growth and Characterization of the Iron-Based Superconductor KFe2As2 Synthesized by KAs Flux Method
- Fast Spin Fluctuation Viewed by Muon Spin Relaxation in Optimally Doped and Overdoped Iron-Based Oxypnictide Superconductors LaFeAsO1-xFx
- High-Tc Superconductivity and Antiferromagnetism in Multilayered Copper Oxides : A New Paradigm of Superconducting Mechanism (Recent Developments in Superconductivity)
- Structural Quantum Criticality and Superconductivity in Iron-Based Superconductor Ba(Fe-xCox)As
- Thermal Variations of Magnetic Excitation Spectrum in Slightly Overdoped Bi2.1Sr1.9CaCu2O8+δ
- Three-Dimensional Electronic Structure of Superconducting Iron Pnictides Observed by Angle-Resolved Photoemission Spectroscopy
- Growth of BaFe2(As1-xPx)2 Single Crystals (0\leq x\leq 1) by Ba2As3/Ba2P3-Flux Method
- High-T_{\text{c}} Superconductivity and Antiferromagnetism in Multilayered Copper Oxides ---A New Paradigm of Superconducting Mechanism---
- Strong-Coupling Spin-Singlet Superconductivity with Multiple Full Gaps in Hole-Doped Ba0.6K0.4Fe2As2 Probed by 57Fe-NMR
- Genuine Phase Diagram of Homogeneously Doped CuO_2 Plane in High-T_c Cuprate Superconductors
- Fermi Surface and Mass Enhancement in KFe2As2 from de Haas–van Alphen Effect Measurements
- Gigantic Effect of Pressure in CeFeAsO1-y
- Anomalous AC Susceptibility Response of (Cu,C)Ba2Ca2Cu3Oy: Experimental Indication of Two-Component Vortex Matter in Multi-Layered Cuprate Superconductors
- Possible Multiple Gap Superconductivity with Line Nodes in Heavily Hole-Doped Superconductor KFe2As2 Studied by 75As Nuclear Quadrupole Resonance and Specific Heat
- X-ray Absorption and Emission Spectroscopy Study of the Effect of Doping on the Low Energy Electronic Structure of PrFeAsO1-δ
- Antiferromagnetic Phase Transition in Four-Layered High-$T_{\text{c}}$ Superconductors Ba2Ca3Cu4O8(FyO1-y)2 with $T_{\text{c}}=55--102$ K: 63Cu- and 19F-NMR Studies
- Isotope Effect in Multi-Band and Multi-Channel Attractive Systems and Inverse Isotope Effect in Iron-Based Superconductors
- Reply to "Comment on 'Isotope Effect in Multi-Band and Multi-Channel Attractive Systems and Inverse Isotope Effect in Iron-Based Superconductors"'
- Strange Inter-Layer Properties of Ba(Fe
- Strange Inter-Layer Properties of Ba(Fe₁₋xCo[x])₂As₂ Appearing in Ultrasonic Measurements