Magnetic structure of a new quantum magnet SrCuTe${}_2$O${}_6$

Abstract

SrCuTe${}_2$O${}_6$ consists of a 3-dimensional arrangement of spin-$\frac{1}{2}$ Cu${}^{2+}$ ions. The 1st, 2nd and 3rd neighbor interactions respectively couple Cu${}^{2+}$ 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 SrCuTe${}_2$O${}_6$ while the other two interactions lead to frustrated inter-chain coupling giving rise to long range magnetic order at suppressed temperatures. In this paper, we investigate the magnetic properties in SrCuTe${}_2$O${}_6$ using muon relaxation spectroscopy and neutron diffraction and present the low temperature magnetic structure.

10 pages, 11 figures, 3 tables