Quasipure Bose-Einstein Condensate Immersed in a Fermi Sea

We report the observation of coexisting Bose-Einstein condensate (BEC) and Fermi gas in a magnetic trap. With a very small fraction of thermal atoms, the ${}^7\mathrm{Li}$ condensate is quasipure and in thermal contact with a ${}^6\mathrm{Li}$ Fermi gas. The lowest common temperature is $0.28\mu \mathrm{K}\simeq 0.2\left(1\right)T_{\mathrm{C}}=0.2\mathrm{}\left(1\right)T_{\mathrm{F}}$ where $T_{\mathrm{C}}$ is the BEC critical temperature and $T_{\mathrm{F}}$ the Fermi temperature. The ${}^7\mathrm{Li}$ condensate has a one-dimensional character.