Incommensurate magnetic fluctuations inLa2−xSrxCuO4
We use inelastic neutron scattering to establish the modulation vectors \ensuremath{\delta} and correlation lengths for the incommensurate magnetic fluctuations in metallic samples of ${\mathrm{La}}_{2\mathrm{\ensuremath{-}}\mathit{x}}$${\mathrm{Sr}}_{\mathit{x}}$${\mathrm{CuO}}_{4}$ with x=0.075 and 0.14. In notation appropriate for a square lattice where the magnetic instability in the undoped case occurs at (\ensuremath{\pi},\ensuremath{\pi}), the vectors \ensuremath{\delta} are along (\ensuremath{\pi},0) and (0,\ensuremath{\pi}). The correlation length \ensuremath{\xi} is larger than the distance between carriers, is weakly dependent on x, and changes significantly between 12 and 100 K for both compositions.