6.2.3 $\mu$SR measurements

For our $\mu$SR measurements, polycrystalline pellets of (Cu_1-xZn_x)GeO₃ (x=0, 2, 4 and 8 %) were prepared at the Department of Applied Physics, the University of Tokyo, using the solid state reactions, starting from a stoichiometric mixture of CuO, GeO₂ and, for the Zn-doped compounds, ZnO [167]. Powder X-ray measurements could not detect any impurity phase.