Room-temperature molecular layer deposition of inorganic-organic hybrid aluminum oxide thin films for preventing spin relaxation of cell inner wall of optically pumped atomic magnetometer

We have succeeded in coating an aluminum oxide thin film of inorganic-organic hybrid on the inner wall of the cell of an optically pumped atomic magnetometer using spin polarization of alkali metal atoms by a unique room temperature molecular layer deposition method. The relaxation time of polarized spin was investigated by using the pump probe method, and it was revealed that the relaxation time of spin polarization can be significantly improved and the relaxation prevention effect can be remarkably exhibited as compared with the case without coating.