Absolute penetration depth measurements in deuterated organic superconductor $\kappa $-(ET)$_{2}$Cu[N(CN)$_{2}$]Br

Penetration depth measurements were performed on fully deuterated $\kappa $-(ET)$_{2}$Cu[N(CN)$_{2}$]Br, an organic superconductor. A novel aluminum plating technique was used to determine the absolute penetration depth $\lambda $(T). As the cooling rate is varied from 30 mK/min to 180 K/min we observe systematic changes in T$_{C}$, superconducting fraction and $\lambda $(T). The data is analyzed using a model of superconducting domains embedded in an antiferromagnetic background.