Magnetic structure of layered LiFe1-xCoxO2: a powder-neutron diffraction study

Layered LiFe1-xCoxO2 compounds have been studied by powder- neutron diffraction in the temperature range 1.5 100 K and at room temperature. The Bragg reflections of LiFe1-xCoxO2 can he indexed in the R-3m space group. At low temperatures, for x < 0.6 samples, an A-type AF structure is observed with a propagation vector k = [00(1)/(2)] and a magnetic moment mu(3b) (Fe3+) = 3.9mu(B). (C) 2002 Elsevier Science B.V. All rights reserved

Nuclear and Magnetic Structure of Layered LiFe1−xCoxO2 (0≤x≤1) Determined by High-Resolution Neutron Diffraction

Mixed lithium-transition metal oxides LiFe1−xCoxO2 (0≤x≤1) have been studied by powder neutron diffraction in the temperature range 1.5-100 K and at room temperature. The low-temperature data analysis of the high-flux neutron diffraction patterns reveals an antiferromagnetic arrangement with a propagation vector k=[0 0 ½ ]. The value obtained for the magnetic moment of Fe3+ ions at 1.5 K, μFe3+=3.9 μB, is in good agreement with the value deduced from magnetization data and is also consistent with the high spin state of Fe3+ ion. The crystallographic structure was determined by both X-ray and high-resolution neutron diffraction measurements