paper

Structure and Physical properties of New layered oxypnictides $S r_{4} S c_{2} O_{6} M_{2} A s_{2}$ (M=Fe and Co)

arXiv:0903.5484 · doi:10.1209/0295-5075/86/57007

Abstract

We have successfully prepared the new layered oxypnictides $S r_{4} S c_{2} O_{6} M_{2} A s_{2}$ (M=Fe and Co). They adopt the tetragonal structure, being the same as that of $S r_{4} S c_{2} O_{6} F e_{2} P_{2}$ . The lattice constants are a=0.4045 nm and c= 0.5802 nm for M=Fe, and a=0.4045 nm and c=1.5695 nm for M=Co, respectively. Their transport and magnetic properties have been systematically studied. The temperature dependence of Hall coefficient and thermoelectric powder for $S r_{4} S c_{2} O_{6} F e_{2} A s_{2}$ compound show complicated behavior, similar to that of iron-based parent compounds LnOFeAs and $B a F e_{2} A s_{2}$ . It suggests that the $S r_{4} S c_{2} O_{6} F e_{2} A s_{2}$ could be considered a new parent compound as iron-based superconductors.

9 pages; 4 figures

Structure and Physical properties of New layered oxypnictides Sr4​Sc2​O6​M2​As2​ (M=Fe and Co)

Abstract

Structure and Physical properties of New layered oxypnictides $S r_{4} S c_{2} O_{6} M_{2} A s_{2}$ (M=Fe and Co)