Topological insulators (TIs) are quantum materials having insulating properties in bulk, but display gapless conducting surface states. These conducting surface electronic states are protected by time reversal symmetry. The spin of electron is locked to its momentum direction, which is the origin of the very high spin orbit coupling. These unique features make them potential for future electronic and spintronics devices. Magnetic proximity effect is a way to induce magnetism into TIs through spin transfer at the interface via exchange coupling. The room temperature magnetism induction in TIs by proximity effect using different magnetic materials needs to be further explored. Polarized neutron reflectivity (PNR) is a depth sensitive technique to quantify the interface magnetism. Here, we propose the study of interface magnetism induced in Bi2Se3 by the ferromagnetic CoFeB by PNR.