Normal state spin susceptibility in the BEC-BCS crossover region.

The magnetic properties of Fermi gases around the BEC-BCS crossover is a topic of interest for its connection to strongly interacting material systems like the high-Tc cuprates. In particular, the spin susceptibility of the Fermi gas is a quantity that can be directly compared across these two very different physical platforms, and one in which the phenomenon of ``pseudogap'' has an established signature, at least on the material side. To this end, we develop a method which use a radiofrequency (RF) dressed spin state to measure the spin susceptibility of a trapped lithium-6 spin mixture near the BEC-BCS crossover region at temperatures from well above the Fermi temperature down to the critical point of the superfluid phase transition. In this talk, I will present our recent results and a comparison to theoretical calculations.