Spin Dilution in Frustrated Two-Dimensional s=1/2 Antiferromagnets on a Square Lattice

N. Papinutto, P. Carretta, S. Gonthier +1

${}^7$Li and ${}^{29}$Si NMR, $\mu$SR and magnetization measurements in Li${}_2$V${}_{1-x}$OTi${}_x$SiO${}_4$, for $0\le x\le 0.2$, are presented. The $x=0$ compound is a prototype of frustr…