| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1828217 | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | 2009 | 4 Pages |
Abstract
In order to elucidate the nature of layered cobalt dioxides AxCoO2, we have investigated their microscopic magnetism by means of positive muon-spin rotation and relaxation (μ+SR) spectroscopy, in particular for A=Li, Na, and K. The dome-shaped magnetic phase diagram for NaxCoO2 with x⩾0.75 suggests the competition between the spin concentration and geometrical frustration on the two-dimensional triangular lattice of the CoO2 plane. The additional experiment on LixCoO2 and KxCoO2 indicates both a weakly coupled regime for the d electrons in the CoO2 plane and an ignorable weak effect of the inter-plane interaction on their magnetic order at low T.
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Physical Sciences and Engineering
Physics and Astronomy
Instrumentation
Authors
Jun Sugiyama, Yutaka Ikedo, Kazuhiko Mukai, Hiroshi Nozaki, Peter L. Russo, Eduardo J. Ansaldo, Jess H. Brewer, Daniel Andreica, Alex Amato,