Single-crystal measurements and a crystalline-electric-field model establish an easy-plane ground-state doublet and ferromagnetic exchange along both axes in CeCuSi, explaining the absence of hard-axis ordering.
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Easy-plane ferromagnetic ordering and crystal-field ground state in the Kondo lattice CeCuSi
Single-crystal measurements and a crystalline-electric-field model establish an easy-plane ground-state doublet and ferromagnetic exchange along both axes in CeCuSi, explaining the absence of hard-axis ordering.