Abstract
A lightly Co-doped spinel Li(Mn0.976Co0.024)2O4 was prepared which crystallizes into a cubic Fd3̄m structure at 300K. No structural changes were found as the temperature was reduced to 7K. Magnetic susceptibility and magnetic neutron diffraction measurements reveal developments of magnetic correlations below 150K. The magnetic correlations were still short range even at 1.4K, with a saturated correlation length at ∼100Å, apparently, Co-doping stabilizing the crystal structure and enhancing the magnetic couplings between the Mn spins.
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