Magnetic ordering and spin waves in $\bf Na_{0.82}CoO_2$

S. P. Bayrakci; I. Mirebeau; P. Bourges; Y. Sidis; M. Enderle; J. Mesot; D. P. Chen; C. T. Lin; B. Keimer

doi:10.1103/PhysRevLett.94.157205

paper

Magnetic ordering and spin waves in $N a_{0.82} Co O_{2}$

arXiv:cond-mat/0410224 · doi:10.1103/PhysRevLett.94.157205

Abstract

Na $_{x}$ CoO $_{2}$ , the parent compound of the recently synthesized superconductor Na $_{x}$ CoO $_{2}$ : $y$ H $_{2}$ O, exhibits bulk antiferromagnetic order below $\sim 20$ K for 0.75 $\leq x \leq$ 0.9. We have performed neutron scattering experiments in which we observed Bragg reflections corresponding to A-type antiferromagnetic order in a Na $_{0.82}$ CoO $_{2}$ single crystal and characterized the corresponding spin-wave dispersions. The spin waves exhibit a strongly energy-dependent linewidth. The in-plane and out-of-plane exchange constants resulting from a fit to a nearest-neighbor Heisenberg model are similar in magnitude, which is unexpected in view of the layered crystal structure of Na $_{x}$ CoO $_{2}$ . Possible implications of these observations are discussed.

final version, to appear in PRL

References in corpus (14)

Spin entropy as the likely source of enhanced thermopower in $\rm\bf Na_xCo_2O_4
Superconductivity Phase Diagram of Na(x)CoO(2).1.3H(2)O
Coupling between electronic and structural degrees of freedom in the triangular lattice conductor NaxCoO2
Unconventional Superconductivity and Electron Correlations in Cobalt Oxyhydrate Na $_{0.35}$ CoO $_{2}$ $\cdot y$ H $_{2}$ O
Bulk antiferromagnetism in $N a_{0.82} Co O_{2}$ single crystals
Ferromagnetic in-plane spin fluctuations in NaxCoO2 observed by neutron inelastic scattering
Static magnetic order in Na $_{0.75}$ CoO $_{2}$ detected by muon spin rotation and relaxation
Three-Dimensional Spin Fluctuations in Na0.75CoO2
Impurity-induced transition and impurity-enhanced thermopower in the thermoelectric oxide NaCo_{2-x}Cu_x$O_4
The crystal growth and characterization of NaxCoO2 and NaxCoO2yH2O
Charge ordering and magneto-polarons in Na $_{0.82}$ CoO $_{2}$
Unconventional Charge Ordering in Na0.70CoO2 below 300 K
Possible unconventional superconductivity in Na $_{x}$ CoO $_{2}$ yH $_{2}$ O probed by $μ$ SR
Spin-Dynamics in the Carrier-Doped $S = 1/2$ Triangular-Lattice of Na $_{x}$ CoO $_{2}$ -yH $_{2}$ O

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Magnetic ordering and spin waves in Na0.82​CoO2​

Abstract

References in corpus (14)

Cited by in corpus (77)

Magnetic ordering and spin waves in $N a_{0.82} Co O_{2}$