Single Crystal Growth and Structure Solution of the Vacancy Ordered Oxide Perovskite Sr(Sr_1/8Er_1/4W_1/2)O₃

<b>Abstract</b>: There is great potential for improvement of quantum information science technology when new and more complex materials are integrated. For quantum transduction specifically, rare earth ions –principally Er³⁺– with weak interactions with each other and the environment are needed for high performance. Here we report a novel Er³⁺-containing perovskite that has an ordered, highly spaced out, arrangement of Er ions. Magnetization measurements indicate weak interaction Θ_cw &lt; 1 K, with no signs of magnetic order down to T = 0.4 K. Single crystal XRD reveals a complex arrangement of Sr, Er, and W on the B-site of the perovskite structure, with signs of additional short range order. Incorporation of Er³⁺ is further indicated by the pink color of the crystals. Thus, this material has the potential to solve the challenges associated with the Er-ion implantation methods that are commonly used by reducing the structural disorder around the active Er³⁺ ions. Future work will look at the transduction response of this material.<br/><br/><b>Acknowledgements</b>: TMM acknowledges conversations with R. J. Cava, J. Thompson, and N. de Leon. ENC acknowledges P. T. Orban and C. J. Lygouras for help with magnetization measurements.<br/><br/><b>Funding</b>: This work was funded by the U.S. Department of Energy, Office of Science, National Quantum Information Science Research Centers, Co-Design Center for Quantum Advantage (C2QA) under contract number DE-SC0012704. This work made use of the synthesis facility of the Platform for the Accelerated Realization, Analysis, and Discovery of Interface Materials (PARADIM), which is supported by the NSF under Cooperative Agreement No. DMR-2039380.