Disentangling the in- and out-of-plane components of the microwave surface resistance in Tl-2201*

Investigation of Tl$_{2}$Ba$_{2}$Cu$_{1}$O$_{x}$ (Tl-2201) properties is important as it provides access to the overdoped side of the superconducting dome. We are measuring the surface resistance of Tl-2201, R$_{s}$($\omega$,T), using a bolometric technique well established by our group. Experimentally separating the in- and out-of-plane components of R$_{s}$ for Tl-2201, however, is challenging due to demagnetization effects. To account for this complication, we are measuring R$_{s}$ of an isotropic replica sample of NbZr in two specific orientations where the field is parallel and perpendicular to the crystal plane. In this talk I will describe the modified bolometric technique, share the technical difficulties encountered in preparing the replica, and present the most up-to-date results.