Neutron diffraction study of YFe10−xCoxMo2

YFe10−xCoxMo2(0 ≤ x ≤ 10) compounds were synthesized and studied by x‐ray and neutron diffraction. Single phase samples with ThMn12‐type structure can be formed in the entire range of composition. Magnetic properties were studied at fields up to 70 kOe in the temperature range of 1.5 K to room temperature. X‐ray diffraction analyses of aligned powders indicate that the easy magnetization direction is parallel to the c axis when x≤6, and deviates from the c axis when x≥8. Neutron diffraction experiments show that the molybdenum atoms exhibit a strong preference for occupying the 8i sites, and cobalt atoms prefer to occupy the 8f and 8j sites.