Electronic Scattering Rates in the High-T$_{c}$ Superconductor Bi$_{2.1}$Sr$_{1.9}$Ca(Cu$_{1-y}$Fe$_{y})_{2}$O$_{x}$

We investigate the effects of Fe impurities in bi-layer BSCCO. It is known that substituting Fe for Cu in this material reduces T$_{c}$, but the mechanism for this decrease is not well understood. We have developed a technique that utilizes ARPES to quantitatively measure the effects of impurities on electronic scattering. Using this technique we investigate the details of how Fe impurities cause an increase in the pair-breaking scattering rate in bi-layer BSCCO.