SrCuTe2O6 consists of a three-dimensional arrangement of spin-1/2 Cu2+ ions. The first-, second-, and third-neighbor interactions, respectively, couple Cu2+ moments into a network of isolated triangles, a highly frustrated hyperkagome lattice consisting of corner-sharing triangles and antiferromagnetic chains. Of these, the chain interaction dominates in SrCuTe2O6 while the other two interactions lead to frustrated interchain coupling giving rise to long-range magnetic order at suppressed temperatures. In this paper, we investigate the magnetic properties in SrCuTe2O6 using muon relaxation spectroscopy and neutron diffraction and present the low-temperature magnetic structure as well as the directional-dependent magnetic phase diagram as a function of field.
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S.C. thanks M. Reehuis for discussion on the magnetic symmetry analysis and J. Schröter, K. Siemensmeyer, and R. Feyerherm for supporting the thermodynamic and magnetometry measurements. B.L. acknowledges the support of the Deutsche Forschungsgemeinschaft (DFG) through Project No. B06 of the SFB-1143 (ID:247310070). We acknowledge the support of the HLD at HZDR, member of the European Magnetic Field Laboratory (EMFL).