The crystal growth and characterization of NaxCoO2 and NaxCoO2yH2O

Abstract

A systematic study of NaxCoO2 (x=0.50 - 0.90) and NaxCoO2 yH(D)2O (x=0.26 - 0.42, y=1.3) has been performed to determine phase stability and the effect of hydration on the structural and superconducting properties of this system. We show that a careful control of the Na deintercalation process and hydration dynamics is possible in single crystals of this system. Furthermore, we give experimental evidence that the dependence of the superconducting transition temperature on Na content is much weaker than reported earlier. Implications of this effect for the understanding of the superconducting phase diagram are discussed.

arXiv comment20 pages, 12 figures

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• Chemical Instability of the Cobalt Oxyhydrate Superconductor under Ambient Conditions
• Unconventional Charge Ordering in Na0.70CoO2 below 300 K
• Chemical, Structural, and Transport Properties of Na1-xCoO2
• Effect of Na content and hydration on the excitation spectrum of the cobaltite Na_xCoO_2 yH_2O

Cited by in corpus (35)

• Magnetic ordering and spin waves in $\mathbf{N}{\mathbf{a}}_{0.82}\mathbf{Co}{\mathbf{O}}_2$
• A critical assessment of the pairing symmetry in NaxCoO2.yH2O
• Spin singlet pairing in the superconducting state of NaxCoO2\cdot1.3H2O: evidence from a ^{59}Co Knight shift in a single crystal
• Searching for Stable Na-ordered Phases in Single Crystal Samples of gamma-NaxCoO2
• Non-magnetic insulator state in Na1CoO2 and phase separation of Na vacancies
• Na content dependence of superconductivity and the spin correlations in Na_{x}CoO_{2}\cdot 1.3H_{2}O
• Anomalous electronic Raman scattering in Na_xCoO_2 H_2O
• Valence and Na content dependences of superconductivity in NaxCoO2.yH2O
• X-ray absorption spectroscopy on layered cobaltates Na_xCoO_2
• Deformation of Electronic Structures Due to CoO6 Distortion and Phase Diagrams of NaxCoO2.yH2O
• Electron-boson mode coupling and the pseudogap of Na${}_x$CoO${}_2$ by infrared spectroscopy
• Study of intercalation and deintercalation of Na_xCoO_2 yH_2O single crystals
• Na order and Co charge disproportionation in Na${}_x$CoO${}_2$
• Single-hole properties of the t-J model on the honeycomb lattice
• Evidence of large anisotropy in the magnetization of Na0.35CoO2.1.3H2O quasi-single-crystal superconductors
• Superconductivity in a layered cobalt oxychalcogenide Na${}_2$CoSe${}_2$O with a triangular lattice
• Restoration of long range order of Na ions in $N{a}_{x}Co{O}_2$ at high temperatures by sodium site doping
• Selecting the suitable dopants: electronic structures of transition metal and rare earth doped thermoelectric sodium cobaltate
• Enhanced Seebeck coefficient by a filling-induced Lifshitz transition in KxRhO2
• Systematic Effective Field Theory Investigation of Spiral Phases in Hole-Doped Antiferromagnets on the Honeycomb Lattice
• Electron-phonon interaction in the lamellar cobaltate Na${}_x$CoO${}_2$
• Hydration-induced anisotropic spin fluctuations in Na_{x}CoO_{2}\cdot1.3H_{2}O superconductor
• Dopant incorporation site in sodium cobaltate's host lattice: A critical factor for thermoelectric performance
• Synthesis of sodium cobaltate Na${}_x$CoO${}_2$ single crystals with controlled Na ordering
• Dynamical magnetic susceptibility in the lamellar cobaltate superconductor Na_xCoO_2$\cdot y$H_2O
• Floating zone growth of α-Na${}_{0.90}$MnO${}_2$ single crystals
• Comment on "Raman spectroscopy study of NaxCoO2 and superconducting NaxCoO2 yH2O"
• Superconducting phase diagram of NaxCoO2.yH2O
• Hard x-ray spectroscopy in NaxCoO2 and superconducting NaxCoO2 - yH2O: A view on the bulk Co electronic properties
• Na Site Doping a Pathway for Enhanced Thermoelectric Performance in $N{a}_{1-x}Co{O}_2$; The Case of Gd and Yb Dopants
• Tuning Co valence state in cobalt oxyhydrate superconductor by post reduction
• Angular-dependent Magnetoresistance Oscillations in Na${}_{0.48}$CoO${}_2$ Single Crystal
• Unconventional superconductivity in NaxCoO2 yH2O
• Magnetic anomalies of hydrous cobaltate compound Na_x(H_3O)_zCoO_2 \cdot yH_2O detected by NMR and NQR measurements
• Weak electronic correlations in the cobalt oxychalcogenide superconductor Na2CoSe2O