Magnetic and superconducting properties of single crystals of Sr2HoRu1−xCuxO6 grown from high temperature solutions

Abstract

Single crystals of Sr2HoRu1−xCuxO6 (with x=0–0.2), measuring 2–3mm across have been grown from PbO–PbF2 based solutions in the temperature range of 1250–1150°C. The crystals exhibit octahedral morphology and belong to the monoclinic space group P21∕n. While Sr2HoRuO6 is found to be antiferromagnetic with weak ferromagnetism below 30K, the solid solutions containing Cu exhibit a diamagnetic transition at 31K which increases in magnitude and temperature with increasing Cu. Through a correlation of magnetic and calorimetric properties, these crystals are concluded to be spin-glass superconductors.

High-temperature thermoelectric properties of the double-perovskite ruthenium oxide (Sr1−xLax)2ErRuO6

“…[15][16][17][18][19] In addition, a possible high-temperature superconductivity has been discussed in Sr 2 LRu 1−x Cu x O 6 .…”

Effect of Pb on the properties of Sr2YRu1‐xCuxO6 crystals grown from PbO‐PbF2 solutions at high temperatures

“…We have been growing single crystals of several members of the new family of double perovskites with the general formula A 2 RERu 1-x Cu x O 6 where A and RE are alkaline earth and Rare Earth ions respectively [4][5][6][7][8][9], since some of these were reported to exhibit superconductivity in polycrystalline form [10][11][12]. As these crystals were grown from PbO-PbF 2 solutions, we felt that it would be appropriate to investigate the influence of Pb on their microstructure and magnetic properties.…”