Ferromagnetic in-plane spin fluctuations in NaxCoO2 observed by neutron inelastic scattering -: art. no. 197201

被引：105

作者：

Boothroyd, AT ^{[1
]}

Coldea, R

Tennant, DA

Prabhakaran, D

Helme, LM

Frost, CD

机构：

[1] Univ Oxford, Dept Phys, Oxford OX1 3PU, England

[2] Univ St Andrews, Sch Phys & Astron, St Andrews KY16 9SS, Fife, Scotland

[3] Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 92卷 / 19期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1103/PhysRevLett.92.197201

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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.

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页码：197201 / 1

页数：4

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