Anisotropic thermal expansion and magnetostructural coupling in CuSb$_{2}$O$_{6}$

Low-dimensional (Quasi-1D or 2D) spin \emph{S}= $1\over 2$ solid-state systems exhibit intriguing electronic and magnetic properties that deserve fundamental attention.\footnote{M. Hase et al., Phys. Rev. Lett. \textbf{70}, 3651 (1993).} Besides, they have long been the subject of intense investigation since the discovery of high-$T_c$ superconductivity in cuprates. Here we present results on anisotropic thermal expansion (TE) and magnetic properties in single crystalline CuSb$_{2}$O$_{6}$ in the temperature range $5 < T < 350$ K. We observe spin-flop transitions for magnetic field applied in $a(b)$ axis, but not in $c$. Our TE data reveals a magnetoelastic coupling in the vicinity of paramagnetic to antiferromagnetic phase transition around $T_{N}$. Also, the temperature dependence of 1D short range magnetic correlations in CuSb$_{2}$O$_{6}$ above $T_{N}$ is reflected in the changes in sample length measured using high resolution dilatometer. Using the scaling of thermal expansion data with the heat capacity data around $T_{N}$,the pressure derivative of $T_{N}$ is obtained as $dT_{N}/dP$= -0.11(1) K/GPa.