We have grown Cu2OSeO3 single crystals with an optimized chemical vapor transport technique by using SeCl4 as a transport agent. Our optimized growth method allows to selectively produce large high quality single crystals. The method is shown to consistently produce Cu2OSeO3 crystals of maximum size 8 mm x 7 mm x 4 mm with a transport duration of around three weeks. We found this method, with SeCl4 as transport agent, more efficient and simple compared to the commonly used growth techniques reported in literature with HCl gas as transport agent. The Cu2OSeO3 crystals have very high quality and the absolute structure are fully determined by simple single crystal x-ray diffraction. We observed both type of crystals with left- and right-handed chiralities. Our magnetization and ferromagnetic resonance data show the same magnetic phase diagram as reported earlier.
@article{arxiv.2104.01465,
title = {Growth and helicity of non-centrosymmetric Cu$_2$OSeO$_3$ crystals},
author = {Aisha Aqeel and Jan Sahliger and Guowei Li and Jacob Baas and Graeme R. Blake and Thomas. T. M. Palstra and Christian H. Back},
journal= {arXiv preprint arXiv:2104.01465},
year = {2022}
}