Ferromagnetic in-plane spin fluctuations in NaxCoO2 observed by neutron inelastic scattering

A T  Boothroyd; R  Coldea; D A  Tennant; D  Prabhakaran; L M  Helme; C D  Frost

doi:10.1103/PhysRevLett.92.197201

Ferromagnetic in-plane spin fluctuations in NaxCoO2 observed by neutron inelastic scattering

A T Boothroyd, R Coldea, D A Tennant, D Prabhakaran, L M Helme, C D Frost

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract

We present neutron scattering spectra taken from a single crystal of Na0.75CoO2, the precursor to a novel cobalt-oxide superconductor. The data contain a prominent inelastic signal at low energies (similar to10 meV), which is localized in wave vector about the origin of two-dimensional reciprocal space. The signal is highly dispersive, and decreases in intensity with increasing temperature. We interpret these observations as direct evidence for the existence of ferromagnetic spin fluctuations within the cobalt-oxygen layers.

Original language	English
Number of pages	4
Journal	Physical Review Letters
Volume	92
DOIs	https://doi.org/10.1103/PhysRevLett.92.197201
Publication status	Published - 14 May 2004

Keywords

SUPERCONDUCTIVITY
SR2RUO4
NACO2O4
MODEL

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10.1103/PhysRevLett.92.197201

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title = "Ferromagnetic in-plane spin fluctuations in NaxCoO2 observed by neutron inelastic scattering",

abstract = "We present neutron scattering spectra taken from a single crystal of Na0.75CoO2, the precursor to a novel cobalt-oxide superconductor. The data contain a prominent inelastic signal at low energies (similar to10 meV), which is localized in wave vector about the origin of two-dimensional reciprocal space. The signal is highly dispersive, and decreases in intensity with increasing temperature. We interpret these observations as direct evidence for the existence of ferromagnetic spin fluctuations within the cobalt-oxygen layers.",

keywords = "SUPERCONDUCTIVITY, SR2RUO4, NACO2O4, MODEL",

author = "Boothroyd, {A T} and R Coldea and Tennant, {D A} and D Prabhakaran and Helme, {L M} and Frost, {C D}",

year = "2004",

month = may,

day = "14",

doi = "10.1103/PhysRevLett.92.197201",

language = "English",

volume = "92",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

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TY - JOUR

T1 - Ferromagnetic in-plane spin fluctuations in NaxCoO2 observed by neutron inelastic scattering

AU - Boothroyd, A T

AU - Coldea, R

AU - Tennant, D A

AU - Prabhakaran, D

AU - Helme, L M

AU - Frost, C D

PY - 2004/5/14

Y1 - 2004/5/14

N2 - We present neutron scattering spectra taken from a single crystal of Na0.75CoO2, the precursor to a novel cobalt-oxide superconductor. The data contain a prominent inelastic signal at low energies (similar to10 meV), which is localized in wave vector about the origin of two-dimensional reciprocal space. The signal is highly dispersive, and decreases in intensity with increasing temperature. We interpret these observations as direct evidence for the existence of ferromagnetic spin fluctuations within the cobalt-oxygen layers.

AB - We present neutron scattering spectra taken from a single crystal of Na0.75CoO2, the precursor to a novel cobalt-oxide superconductor. The data contain a prominent inelastic signal at low energies (similar to10 meV), which is localized in wave vector about the origin of two-dimensional reciprocal space. The signal is highly dispersive, and decreases in intensity with increasing temperature. We interpret these observations as direct evidence for the existence of ferromagnetic spin fluctuations within the cobalt-oxygen layers.

KW - SUPERCONDUCTIVITY

KW - SR2RUO4

KW - NACO2O4

KW - MODEL

U2 - 10.1103/PhysRevLett.92.197201

DO - 10.1103/PhysRevLett.92.197201

M3 - Article

SN - 0031-9007

VL - 92

JO - Physical Review Letters

JF - Physical Review Letters

ER -

Ferromagnetic in-plane spin fluctuations in NaxCoO2 observed by neutron inelastic scattering

Abstract

Keywords

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