Spin Excitations in La$_{1.75}$Sr$_{0.25}$Zn$_{0.01}$Cu$_{0.99}$O$_{4}$

Recently, reports of a dramatic enhancement in the dynamic, incommensurate, spin density wave response in overdoped La$_{2-x}$Sr$_{x}$Cu$_{1-y}$Zn$_{y}$O$_{4}$ [PRB \textbf{72}, 064521 (2005)] have provided considerable insight toward the microscopic understanding of Zn-induced magnetic states and their interaction with the superconducting phase. As a continuation of these studies, in this talk we will present our recent inelastic neutron scattering studies of spin excitations within the Zn-doped cuprate, La$_{1.75}$Sr$_{0.25}$Zn$_{0.01}$Cu$_{0.99}$O$_{4 }$(LSCZO x=0.25, y=0.01). The dispersion of the spin density wave excitations throughout the Brillouin zone will be presented along with the local spin susceptibility from $\Delta $E=0-45meV. Particular focus will be given to the modifications in the magnetic behavior induced via Zn-substitution in this overdoped LSCZO system.