  The magnetic field-induced superconductor-insulator-metal transition (SIMT)
in partially deuterated $\kappa$-(BEDT-TTF)$_2$Cu[N(CN)$_2$]Br, which is just
on the Mott boundary, has been observed using the infrared magneto-optical
imaging spectroscopy. The infrared reflectivity image on the sample surface
revealed that the metallic (or superconducting) and insulating phases coexist
and they have different magnetic field dependences. One of the magnetic field
dependence is SIMT that appeared on part of the sample surface. The SIMT was
concluded to originate from the balance of the inhomogenity in the sample
itself and the disorder of the ethylene end groups resulting from fast cooling.
