Searching for scalar field dark matter with hyperfine transitions in alkali atoms

Fundamental constants such as masses and coupling of elementary particles can have small temporal spatial variations in the scalar field dark-matter model. These entail time oscillations other constants, Bohr nuclear magnetons, radius, hyperfine structure constant. In presence an external magnetic field, these induce transitions atoms molecules. We determine probability dipole transitions, caused by oscillating fundamental propose experiment that could detect dark matter through this effect. This may be sensitive to axion with mass range $1\text{ }\text{ }\mathit{\ensuremath{\mu}}\mathrm{eV}<m<100\text{ }\mathit{\ensuremath{\mu}}\mathrm{eV}$.