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Chromium site selective substitution inCa3Co2O6: Influence on the magnetic properties of an Ising-like triangular lattice
2004
Physical Review B
The structure of the Ca 3 Co 2 O 6 compound is made of chains on a triangular array. The intra-and interchain coupling are ferromagnetic and antiferromagnetic, respectively, and the chain itself contains a 1:1 alternation of CoO 6 trigonal prisms (TP) and octahedra (oct.). The Co 3+ spin states are high spin ͑S =2͒ and low spin ͑S =0͒ in the TP and the oct., respectively. It is found that a few percent of Cr 3+ ͑S =3/2͒ substituted for the low spin Co oct 3+ ͑S =0͒ greatly affect the magnetic
doi:10.1103/physrevb.70.094418
fatcat:vbxt7jkdu5hvzasfffax23syge