A SCHEME FOR A SPIN-COUPLING EXPERIMENT IN-SPACE USING MAGNETIC-MATERIALS WITH A DC SQUID

In an Earth-bound laboratory, we have improved the sensitivity of the spin-coupling experiment by two orders of magnitude using a paramagnet ic salt with a DC SQUID to search for a possible axion-like sigma . r interaction of a rotating mass with a paramagnetic salt. Two orders of magnitude more improvement in the Earth-bound laboratory is envisaged . Here we propose to use a similar scheme for a space spin-coupling ex periment. Both paramagnetic materials and ultra-soft ferromagnetic mat erials are considered.