Abstract
We report the structural, magnetic, and electrical transport properties of Y2Ir2−xCrxO7 pyrochlore iridates. Chemical doping leads to the order of magnitude enhancement of electrical conductivity. The introduction of Cr3+ at the Ir4+ site tends to distort the Ir–O6 octahedra and weakens antiferromagnetic correlation. The x-ray photoemission spectroscopy measurements suggest the coexistence of Ir4+ and Ir5+ valence states in the Y2Ir2−xCrxO7 compounds. The concentration of Ir5+ is enhanced with Cr doping, leading to weak ferromagnetism and enhanced electrical conductivity. A cluster-glass-like transition is also observed at low temperatures with Cr doping, possibly due to competing ferromagnetic and antiferromagnetic interaction.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
