We report on muon-spin relaxation/rotation measurements on the Li2CuO2 cupr
ate. Spontaneous muon-spin precession frequencies are observed below the Ne
el temperature T-N = 9.2 K. An additional phase transition is observed at T
' = 2.4 K, which is interpreted as a spin canting. From the temperature dep
endences of the internal fields it is suggested that Li2CuO2 consists of tw
o magnetic sublattices, with magnetic moments on both copper and oxygen ion
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